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More FAQs about Pump/Plumbing Noise, Prevention, Abatement and Aquarium Systems... or Save My Sanity, PLEASE! 3

Loud Overflow (Another Overwhelmed 'Mega' Drain) -- 07/17/08 I have recently set up a 90 gallon reef tank with a central inside the tank standard Mega overflow kit. <<As yes, the grossly overstated 1-inch overflow kit>> It drains through a one-inch bulkhead into a 30gallon sump below the stand. I have been doing a lot of research concerning Stockman, Durso, and Hofer gurgle overflow pipe constructs that supposedly will quiet down the gurgling noise. <<Will help'¦as long as you aren't simply overcoming the drain with too much flow. Regardless of what may be stated in your kit, trying to run more than 300gph through a 1-inch gravity drain is trouble>> I am still confused which one will work best for an inside the tank overflow which is 24 inches tall. <<Differing means to the same end. All will probably elicit a change'¦finding which one fits and performs best for your situation/setup will take some experimentation>> I am worried about handling the outflow. <<'¦?>> I have a Gen-X pcx-40 pump <<Yikes! Unless you have a ton of headloss or this pump is throttled way-back, it is way too much pump for a single 1-inch drain (see my earlier comment re)! You have a dangerous potential for flooding, and as you have discovered, noisy siphon effect going>> which I plumbed into our crawlspace for noise control, and the standard design of the Hofer gurgle pipe only handles 5-600 gph. <<In reality this is plenty'¦the concern is over how much flow your 1-inch drain can safely handle (300gph)>> I was trying to determine should I increase the size of Hofer gurgle to 1.5 inch and 2 inch pipe, does it need to be taller than the design on their website which is only 5 inches tall and then extend the air tubing above the water line, or is there a better option for noise control that can handle the overflow? <<I would follow the recommendations of the designers'¦and visit/query the reef forums for others input re their design modifications, if any. But the real issue you need to address is flow rate. As stated, you just have too much water being pumped to the tank for the 1-inch overflow to handle. I would suggest you downsize the return pump (best option), or at the least install a gate valve on the output side of the pump to reduce flow to that which the drain can safely handle'¦even with an aftermarket 'gurgle pipe'>><RMF would have another drain line drilled, fitted.> Thanks, Mark <<Good luck with your plumbing project. EricR>>

Tank plumbing Siphoning Overflow 7/1/08 I was setting up the plumbing for a 20 gallon tank I'm using as a frag tank. It is drilled from the bottom with a 2" PVC going straight down into a 20 gallon refugium/sump. <A serious overflow for a 20 gal!> Its a straight drop into the refugium and I have a 'T' in the PVC and under the 'T' a ball valve, so that I can regulate the flow go into the refugium and the rest of the water will be diverted into the side of the sump with the mechanical filter, and in the middle of the sump is the return. I built the stand as well but didn't get around to putting any paneling on it so its quite loud. To solve this I extended the PVC down into water, realizing this would make that lovely toilet flushing sound, but thinking it would be more tolerable than the sound of the water crashing into the sump. <Both are curable.> My question is can I drill a hole into the PVC just above the waterline to solve the problem of the toilet flushing sound? <Yes, tis the solution, even with such a large drain line. Drill just large enough to slip a piece of vinyl or other tubing in to slide up and down, you will need the end of the line inside the pipe about an inch or two below the waterline inside the pipe to prevent siphoning.> If not, is there any other way to work around this problem? <Nope, you have the solution.> Given the choice, I'll take the toilet flushing over a waterfall, but it would be nice to be able to fix it. <You can fix both.> Thanks. <Welcome, Scott V>

Re: Had enough noise...Need help!!! 6/16/08 Thanks Bob ! for your response, <Welcome Jun!> Rich actually response back and he said that it might(?) fit. But after reading these (Durso pipe style) in your site, I figured I will just make my own... heck, if I was able to remodel my kitchen myself I believe I can do this one! <I'll say!> One more problem that I have is, I got this Coralife lighting system (pro series) 2 HQI 150w a pc/ 2 actinic CF and it's 48" inches long... I got it really really cheap at this FS which is closing down, now the problem is that I have a canopy which is 12" high (measure fr the outside) and probably 10" if measured fr the inside. I know you're not suppose to put this type of lighting system in there but can't resist on buying it for only $250. Is there anyway that I can make this happen? <Yes... should be able to add some reflectance, thermal shielding...> there should be enough clearance on top, after placing this lighting (maybe 2") and the sides I have no problem as the tank is 60" long...I was thinking of putting a few fans and drill some holes at the very top of the canopy to release the heat? <Yes... I'd even have a few extra holes/chimneys for passive release> as hot air goes upward ? <Last time I checked in this universe, yes> what would be your suggestion... pls pls don't say I have to give up either one of them...canopy or lighting. <You don't> One last question (I know), I got this ASM G1 (loved it!) that comes with the G500 pump (forgot the brand) <Mmm... likely a Rio> and it's not Sedra... after reading your site there is another one ASM G1X ? <Sure> what is the difference between the two? <Capacity... flow rate, pressure> the G1X comes with a Sedra 3500 pump which I believe is more powerful than the G500... can I replace mine with the Sedra 3500 ? <Yes and yes> and will it make a huge difference. <Appreciable, yes> My wife said I read more of your book than the Bible, I said....that is my Bible, "Fish" Bible! <Glad for the clarification> ...we didn't talk for a couple of days...but we're ok now... man! I love this hobby. Cheers Jun <Me too! Cheers! BobF!>

Noisy Plumbing 5/28/08 Hello crew, <Hello Paul.> I have just began test running a new 110g setup. I have 2 1.5" drain lines drilled a few inches from the top on the back glass enclosed in an overflow box. The drain lines come out of the back in a 90 with a drilled hole at the top. They then fall 10" and have a 45 facing toward the wall, run another 8" to another 45 to point down to the floor. They then run through the floor to the sump with more a couple of more 45's and 90's into the sump. Total distance is about 14'. <OK> My return pump is a ReeFlo Barracuda. I have 2 1/2" return lines that total about 480gph completely open. The rest of the flow splits between a 29g refugium and a line back to the 100g sump/refugium. I have the typical sucking noise from the overflow box as well as the gushing sound in the drain lines. <Sounds like siphoning.> I have used rigid tubing for aspiration but cannot seem to quiet it down. My tubing is only about 12". Should I get longer tubing and to try and get it down further? <What you have should work in respect to the upper elbow.> The noise seems to begin between the 2 45's. Are the 2 1.5" drain lines too small? <Not for 480 gph.> The noise is greatly reduced if I scale it back to 280gph on the return lines but that doesn't seem to be enough turnover. <No.> Reading through your site suggests that I should be able to get 500(quiet)gph through 2 1.5" bulkheads. <Easily.> Also, any suggestions on quieting down the overflow box. The overflow is from Glass-Holes and it comes with a plastic shield around the top of each bulkhead so that the water is pulled from underneath to reduce suction. <Actually to keep the noise issues of the water running down the line from happening. I actually designed this system ?> The fact that the water level in the overflow box remains so low suggests that I don't have enough return flow to keep a higher water level. <Really should not matter with this box.> I'm not really sure though because I think that if I bump up the return gph then it will become louder in the drain line but might reduce the sucking noise in the overflow box. <Again, it does sound like siphoning is occurring somewhere in the line. This will make it loud throughout the system.> So much to think about.. I also have the ability to add 2 more 1/2" returns if the problem is that there isn't enough return flow but your site suggests the opposite. <The flow in and out are fine, there are other issues at play here.> Any help would be great. <I do suspect that you have some 'backup' along the overflow line. This could cause a siphon and lead to your issues. It is possible that this spot may need to be aspirated also. Please do call Mike at Glass-Holes, 805-598-1706, he will help you sort out this issue both with the lines and the box. Do write back to let everyone that may read this know the outcome.> Your website has been an invaluable resource to this hobby. <Thank you Paul.> Thanks Paul <Welcome, talk soon, Scott V.>

Re: Noisy Plumbing 5/31/08 I just want to let you know I resolved this issue. Everything is much quieter now. <Great!> I was able to move things around and make the drain lines straight until they get to the floor. <This can make a difference.> I added another line up because I was planning on doing that anyway. I am closer to 700gph now. I then started playing with the siphon tube and things quieted right down. I was also able to keep a little higher level in the overflow box as well. I think the configuration of my drain lines were causing the most problems due to the 45's being within 8" from the bulkhead. <Likely so.> It sounded like that was where the noise was coming from and now that I eliminated them everything is near silent. Thank You.... <Good to hear, welcome and happy reefing, Scott V.> Paul

Noise Level and "Micro" Bubbles 4/29/08 Thanks for your guidance in the past in setup. <You're welcome.> I have two questions about my still lifeless tank. I have a used Dutch AS 75 G flat back hex tank which I restained and varnished, drilled for two 1.5 bulkheads in the top corners. 90 pounds of very cured Live Fiji rock. I have installed it with two overflow PVC 1.5 pipes running from L's at the bulkhead. Each L has a 1/4 inch John Guest Air valve to allow air suction into the 90s and prevent "burping". <Is the airline run down into the drain line?> The pipes run down to a 30 gallon 30X18X12 sump/refugium, which is turning out to be too tall. One pipe goes directly to the 12 inch ASM G2 skimmer chamber (right side of sump); one passes the 9 inch refugium (left side of sump) with a teed 3/4 inch ball valve dropping a few gph into the fuge, and then continues to the skimmer chamber. Middle chamber is a 6 inch pump chamber housing an OR6500 pump. Bubble trap baffles between the skimmer and the pump chamber, although I made these too narrow and may be promoting too rapid flow. <This can be a problem with not enough dwell time through the baffles to allow the bubbles to escape. Foam between two of the baffles can make a huge difference.> Exhaust enters the sump below the waterline from the 2 1.5 drain lines but is dropping a lot of bubbles. <They will, this needs to be managed.> Some appear to be making it past the trap and back into the tank. I did not build a bubble chamber for the skimmer section, and I have not employed socks, because the sump is so tall I would have a hard time accessing/changing them, and would turn them into nitrate sources. <This too can be a big help for you. You will need either a filter sock (even if it is a pain to change) or to fabricate something your drains can dump into forcing the water and air to come back up before transiting the rest of the sump. I used to have my overflow dump into a 1 liter bottle with the top cut off for this purpose!> OR6500 pumps 1.25 line out through 6 inches of flex, threaded connection, union, ball valve, 2 45s, 3 foot rise, tees at the top of the tank into two 1s and drops water into the tank about an inch below the surface. Both sides are blasting microbubbles. <Frustrating.> In order to reduce bubbles I have tried vaselining pressure-side joints to check for any venturi above the sump waterline and found none. I have damped flow down from the refugium and seen minimal impact. I suspect the problem is with the volume speed through the baffles. <It is sounding that way.> So much for background: 1) Short of reengineering my sump, which may be inevitable, what other suggestions can you offer to reduce bubbles ?2) I have not seen much foam or skimmate in my ASM. I only have a few hermits and snails aside from the LR so there is not much to skim. Is it true that fresh salt water takes some time to "ripen" and reduce surface tension and that the skimmer and bubbles will improve over time? <Yes, more of the components in the tank being new with manufacturing residues floating about.> 3) I don't have overflow boxes, just two 90s acting as drains which are currently level with the waterline. They are loud. Is there any trick to minimize their noise level? <First, be sure the open end of the elbow is pointing down into the water. This will keep the inside of the line from being exposed to the atmosphere and your ears. Next you may need to experiment a bit with the air inlets on the elbows. John Guest fittings are nice, but you will need to be able to run the airline down into the elbow a bit. How far down for your case it the experimental part, you will need to play with this distance until the overflow is quiet. Generally 4' down in from the top of the elbow will get you fairly close for this amount of flow. Your drains are sized well for this pump, you can get these quiet.> Thanks, as always, John. <Welcome John. You have a bit of playing to do, but this flow can be managed through a sump this size. It is just all about directing it, making the bubbles work around obstacles to get into the return pump. Keep with it, good luck, Scott V.>

Re: Noise Level and "Micro" Bubbles 5/6/08 Thanks for your guidance in the past in setup. <You're welcome.> I have two questions about my still lifeless tank. I have a used Dutch AS 75 G flat back hex tank which I restained and varnished, drilled for two 1.5 bulkheads in the top corners. 90 pounds of very cured Live Fiji rock. I have installed it with two overflow PVC 1.5 pipes running from L's at the bulkhead. Each L has a 1/4 inch John Guest Air valve to allow air suction into the 90s and prevent "burping". <Is the airline run down into the drain line?> {no, just a gate valve on the ell. I will extend the line down into the pipe 4 inches} <<This will make a big difference.>> The pipes run down to a 30 gallon 30X18X12 sump/refugium, which is turning out to be too tall. One pipe goes directly to the 12 inch ASM G2 skimmer chamber (right side of sump); one passes the 9 inch refugium (left side of sump) with a teed 3/4 inch ball valve dropping a few gph into the fuge, and then continues to the skimmer chamber. Middle chamber is a 6 inch pump chamber housing an OR6500 pump. Bubble trap baffles between the skimmer and the pump chamber, although I made these too narrow and may be promoting too rapid flow. <This can be a problem with not enough dwell time through the baffles to allow the bubbles to escape. Foam between two of the baffles can make a difference.> {Wouldn't foam slow flow further? } <<No, it will just serve the purpose to trap bubbles. Use the coarser filter type foams.>> Exhaust enters the sump below the waterline from the 2 1.5 drain lines but is dropping a lot of bubbles. <They will, this needs to be managed.> {OK..........} Some appear to be making it past the trap and back into the tank. I did not build a bubble chamber for the skimmer section, and I have not employed socks, because the sump is so tall I would have a hard time accessing/changing them, and would turn them into nitrate sources. <This too can be a big help for you. You will need either a filter sock (even if it is a pain to change) or to fabricate something your drains can dump into forcing the water and air to come back up before transiting the rest of the sump. I used to have my overflow dump into a 1 liter bottle with the top cut off for this purpose!> {My space is cramped with a gate valve modded G2 but I will see if I can squeeze something in. } <<Even a small cup that forces the air back up before the water is allowed to flow through the sump can have an impact.>> OR6500 pumps 1.25 line out through 6 inches of flex, threaded connection, union, ball valve, 2 45s, 3 foot rise, tees at the top of the tank into two 1s and drops water into the tank about an inch below the surface. Both sides are blasting microbubbles. <Frustrating.> {Yup} In order to reduce bubbles I have tried vaselining pressure-side joints to check for any venturi above the sump waterline and found none. I have damped flow down from the refugium and seen minimal impact. I suspect the problem is with the volume speed through the baffles. <It is sounding that way.> {Yup.} So much for background: 1) Short of reengineering my sump, which may be inevitable, what other suggestions can you offer to reduce bubbles ?2) I have not seen much foam or skimmate in my ASM. I only have a few hermits and snails aside from the LR so there is not much to skim. Is it true that fresh salt water takes some time to "ripen" and reduce surface tension and that the skimmer and bubbles will improve over time? <Yes, more of the components in the tank being new with manufacturing residues floating about.> {Actually only the Sedra is new. Everything else including the g2 body is used.} <<Even that can impact skimmer performance, or you just don't have much to skim as you mentioned. You're water tests will tell you which.>> 3) I don't have overflow boxes, just two 90s acting as drains which are currently level with the waterline. They are loud. Is there any trick to minimize their noise level? <First, be sure the open end of the elbow is pointing down into the water. This will keep the inside of the line from being exposed to the atmosphere and your ears. > {Are you saying facing the tank bottom? Thant would place my overflows 8 inches below the waterline? Or are you simply saying 45 degrees from vertical like 10:30 and 1:30? } <<However far you need to rotate them so the open end is underwater. Without boxes you may have to construct a little standpipe to get the desired water level. Be creative!>> <Next you may need to experiment a bit with the air inlets on the elbows. John Guest fittings are nice, but you will need to be able to run the airline down into the elbow a bit. How far down for your case it the experimental part, you will need to play with this distance until the overflow is quiet. Generally 4" down in from the top of the elbow will get you fairly close for this amount of flow. Your drains are sized well for this pump, you can get these quiet.> Thanks, as always, John. <Welcome John. You have a bit of playing to do, but this flow can be managed through a sump this size. It is just all about directing it, making the bubbles work around obstacles to get into the return pump. Keep with it, good luck, Scott V.> Thanks for your help. {Thanks. I will try these suggestions.} <<Welcome, good luck, Scott V.>>

Overflow... Not reef ready 4/29/08 I have a reef ready 90 with the built in overflow in the back. (older style?) I have a mag 9.5 return pump. The return goes from the sump to the bottom of the standpipe, maybe 24" then up into the overflow box another 24". <OK> The problem is I am getting a lot of noise from the overflow, I hear most of it from the top of the tank. The tank is equipped with the stock standpipes. After Googling I found that the overflow is rated for 600gph, <And in reality only flow 300 without issues.> and the mag 9 is 800gph @ 48" head, so why would I still be getting the air noise? Is there an adjustment I can make to make it more quiet? <The fact of the matter is the 1' drain provided in these overflows cannot handle nearly what the Mag 9.5 can pump back up to the tank. At the very least this will be evident with the noise you are experiencing, at the worst you will end up with water on the floor. By forcing the drain to handle more than it can you will be forcing it to siphon somewhat, creating the gurgling and flushing noises you are hearing. You will need to put a ball valve on the output of the Mag and restrict the flow until the noise subsides.> Thanks in advance <Welcome, good luck, Scott V.>

Please Help! At My Wits End Trying to Solve This Problem... (Another Overwhelmed 'Mega' Overflow?) -- 03/03/08 I have a 150 gallon glass aquarium with Megaflow Overflow system, Euro-Reef skimmer with Sedra pump, and 2 Mag-Drive pumps (950 gph). <<'¦! Is this for each!? I'm guessing this 'Megaflow' system (can you hear the sarcasm in my voice [grin]), consists of a single 1' drain, yes? Realistically, this would limit you to about 300gph en toto for the return pump(s)'¦after headloss>> The system is 5 years old. The pumps are all originals but well cleaned and cared for. I can honestly say the system has been virtually silent since I purchased a Euro-Reef Isopad soon after system was set up 5 years ago. <<Ah, yes'¦isolating pump vibration can make a remarkable difference>> About a week ago a major change occurred. I came home to very loud rushing water noise (like toilet flushing constantly). <<Mmm, a siphon surge'¦generally means you are pushing more water to the tank than the overflows/drains can safely handle>> The pumps and skimmer appeared to be working well with no apparent air leaks. The drain pipe/return pipe appears tight in bulkhead and in correct position. No matter what I do to try to quiet the system nothing works. When I turned the system off I heard an extreme high whining noise (like something was stuck in line). <<Hmmm'¦or maybe sucking/pushing are through a very small leak (pinhole)>> I continued to turn the system on and off until I could no longer hear the whine. <<'¦?>> The system is not hard plumbed and usually I can "burp" the air out easily by moving the flexible down lines a couple of times. <<Mmm, better to aspirate these if this is a continual problem. This involves inserting a length of small-diameter tubing down the overflow pipe to allow air to escape when the system is 'running.' Determining the best length/diameter for the tubing usually requires a bit of trial-and-error>> This has no effect on the noise now. <<Agreed'¦not a panacea>> The noise (rushing water and air) seems to originate along the lines draining into sump or up in the aquarium, not in the sump. <<Indeed'¦a result of too much flow>> Adjusting the water level using the air intake elbow has not been successful. The drain pipe and return pipes seem to be firmly in place in the bulkheads. I know of nothing that could have been sucked into the system. I did have a problem with overgrowth of sponges over my live rock etc when I was feeding my puffer mussels daily. The sponges were evident and growing out of the overflow. I fear that somehow they are constricting my lines internally? Is this possible, how do I eradicate? <<This is possible'¦and would explain the change in the systems' performance'¦Replacing the drain pipe/tubing is an option, but I think you have other issues here as well. This problem is almost certainly an issue with 'too much water volume' being pushed down the drain line. Frankly, with the return pumps you list, I'm amazed you haven't had a serious flood before now. Those Mag-Drive pumps must be working against some serious head pressures. Even so, it sounds like your drain has been operating in a dangerous 'siphon' mode where the slightest obstruction; in this case possible buildup of organic matter, can cause serious problems. I think you were lucky this time in that the drain was able to 'surge' and keep up with the flow, albeit in a very noisy/annoying manner, and didn't just back water up all over your floor>> I am at a loss as to what do next. <<If you don't have gate-valves plumbed on the return side of the pumps (recommended), try turning off one of the return pumps to reduce the return flow and see what happens. As stated, with the 1' drain line you should shoot for a flow-/drain-rate of no more than 300gph. And obviously, come up with alternative methods for producing necessary 'water movement' within the display>> Thank you for your assistance. Leslie <<Give the flow reduction a try, Leslie'¦and write back to discuss further if you wish. Regards, Eric Russell>>

Follow Up Note On My Email To You on 3/3/08 (Sys. Plumbing/Bristleworms/Puffer) -- 03-15-08 I wanted to thank Eric Russell for his assistance on 3/3/08. <<Eric here'¦you are quite welcome, Leslie>> I was so frustrated that I was ready to give my fish away (or worse) and close down the system! <> He gave me the support and guidance to get through a really miserable few days until my aquarium was fully functioning again and my 4 charges were alive and well. (This includes my original 5+ year old dogface puffer, 5 year old Foxface, 4 year old Picasso trigger and 3.5 year old hippo tang.) <<Is rewarding to know>> Thank you, thank you Eric, as I thought my puffer was a goner , not eating for 4 days. <<Most welcome again, my friend>> You guys and gals probably do know what a wonderful service you provide and you are so appreciated in 911 situations. <<It truly is our wish for you/the hobby to succeed'¦thank you for the kind words>> I had written because my 150 gallon all glass aquarium with MegaFlows had started gurgling and siphoning. The system is 5+ years old and usually quiet. The noise was a very sudden change and no matter what I tried nothing worked. With Eric's advice I tried to aspirate the air. Did not work, if anything noise, gurgling just became worse. <<It can take quite a bit of fiddling to find the right combination of tubing diameter and insertion length'¦but still'¦is no panacea>> Eric confirmed my fear that it was possible that my drains ( 2 drains, each 1"diameter ) could be plugged from organic matter. (Ii fed my puffer daily mussels to keep his beak in check). <<Indeed'¦many cryptic organisms find this environment agreeable to them>> Eric suggested I might need new lines. <<Is often the simplest approach to this issue>> I also suspected my Euro-Reef skimmer might be at fault for the extra air being pulled into the system. It still produced good skimmate amounts but was getting more and more difficult to start pump. At times required pump to be disconnected from skimmer and tilted around before it would start. <<Ah, yes'¦I very recently had to replace all three Sedra pumps on my own ER skimmer (made the switch/upgrade to the ER-modded Eheim pumps)>> Anyway, due to undergoing treatment for a medical condition, I am quite weak right now, and had to hire my local LFS to come to my home. They determined there was nothing wrong with skimmer function (wrong) and thought the flow was just fine, did not agree noise was anything but normal. <<Disappointing to know>> I insisted they break system down and evaluate. <<Excellent>> This took them over 2 hours (at $85.00 an hour, <<Yikes! Maybe I am in the wrong biz'¦ [grin}>> I know MD's that are less expensive, but who's going to argue at this point. <<Actually, from what I've read I think that fee is about 'median' and not unreasonable. Regardless'¦you should still expect them to know what they are doing/provide quality service>> The Mag 9.5 pumps were fine, but the drain lines were at least 50% clogged with fibrous tissues (sponges?) <<Quite likely>> but worse, thousands of bristle worms. <<Not the monsters many folks think them to be. Can be/are quite beneficial detritivores'¦although extremely high population densities can be an indicator of excess organic material (overfeeding)>> Unfortunately, when the drain lines were reinstalled and the system started up hundreds of baby and not so baby bristle worms were blown into my aquarium. This was so upsetting as I keep a meticulous aquarium (at least the parts I can see). <<Relax my friend, no reason to be upset at this point. Back off a bit on the feedings and the worm population should adjust accordingly>> I do every other day 8-gallon water changes and visually the aquarium looks pristine. <<Ah, but as you are learning'¦much going on/present that isn't always 'visible' to the naked eye>> My puffer requires this and I think this is why he has lived so long. But I am side tracking, sorry... <<No worries'¦all pertinent/worth sharing>> Anyway, when the LFS left my home I was left with a sump full of bristle worms. Most were about an eighth of an inch long but there were many big ones, 1-2 inches in size. <<Mmm'¦have seen much bigger, and are of little concern as stated. Think about it, these worms have been in your system for years'¦you didn't have any problems re, or even think about them when you didn't 'see' them>> Also 2 big piles of worms (I mean about 2 inches high) were deposited in the aquarium. My trigger was going crazy but even he wasn't hungry enough to clear them. As it was about 8 pm and dark by now I quickly did a 20 gallon water change and collapsed into bed. Next Am I moved live rock from 1/4th of aquarium and of course there were piles of the worms under it. I still need to continue my quest and break down the other 3/4ths of aquarium and vacuum up what I can). <<You can do this if you wish'¦but is not necessary in my opinion>> Any thoughts on how to rid the strangers? <<You really don't want to be 'rid' of them'¦.they serve a very useful purpose. But as implied earlier, reducing excess foodstuffs in the tank will limit the population>> I don't want them growing inches long. <<Too late [grin]'¦but no reason to panic>> I will not overfeed aquarium but at this point I want them out! <<These organisms are a necessary and useful component of a 'balanced' system>> I agitated the sump water in the skimmer and it picked up several hundred more from there. Then I got really discouraged and just completely emptied the entire sump and cleaned it all out of any water and worms. The doorbell rang with my new Sedra 5000 pump for skimmer, it was perfect timing. <<Indeed'¦a well functioning skimmer will also help with the excess organic load, obviously>> Even the fiber block that is in sump after the floss/ carbon/ was filled with baby bristle worms. The foam on the Euro-Reef skimmer full too. Now skimmer with new pump is up and going, lines are clean, about 100 gallons of water have been changed in the last 3 days. Gurgling has stopped, no siphoning anymore either. <<Yay!>> Now I have one question. How do I prevent this from occurring again in 3-4 years? <<Hmm'¦it's not likely it can be 'prevented''¦but reducing dissolved organics in the water that feed the sponges will slow down their growth/expansion. Also'¦reducing flow rates a bit (i.e. -- not maximizing/overwhelming the drain's capacity) will allow a bit of 'wiggle room' for such growths>> I don't want to feed my puffer any more mussels after seeing this residue, <<Oh'¦don't stop altogether'¦just be more judicious re>> also I think the sponges really picked up growth when I started putting Selcon on food about 9 months ago. <<Mmm, yes'¦while quite beneficial, it has been my experience that use of this and other such food boosters requires careful use as they can be abused. I do recommend you keep using the Selcon'¦but keep its use to no more than once or twice a week as a food soak>> What do I do to keep his beak from growing so fast? <<As stated'¦don't 'completely stop' feeding shellfish to the puffer, but rather cut back a bit maybe (as well as other foods/potential over-feedings)'¦and do also add some chemical filtration (carbon/Poly-Filter) to your system>> He only occasionally takes bites out of the coralline live rock. I was trying to think of a way I could attach his favorite big hard algae wafer to a mussel shell. That way he would still bite hard against the shell and keep beak in check. <<Keep feeding what the fishes need/require'¦and 'step-up' the filtration/husbandry to cope re>> The LFS said that puffers don't live long when they are at the size of mine but I just don't believe that. <<'¦?! And they based that statement on'¦? Seems a ridiculous thing to say, to me>> He has done wonderfully and never has had a disease. <<Testament to your good care and a proper diet, no doubt>> What is the oldest age you know for a captive dogface? <<Have heard this can be more than a decade>> Well, that is the end of my tale. I write to say thank you but also so others can learn from my bad experience and hopefully save some agony. <<Many thanks for sharing>> Thank you Eric and all of the team. <<We are all pleased to assist>> Oh, I did also have valves added as recommended by Eric. <<Excellent move!>> Sincerely, Leslie <<Be chatting'¦ Eric Russell>>

Overflow Noise 2/13/08 I have a 1254 with 2 overflows and a drilled tank. It is drilled on the 2 back outside corners and has 2 8" overflows made from glass. Each houses a Durso 1.5" overflow. These use a flex hose to return to sump and drop from top of BS-2 Sump through sock filters. I have had a flushing issue with the left hand overflow since filling. I have tried rerouting, replumbing with 1" pvc. <Is the bulkhead draining the overflow 1' and the Durso oversized to 1.5' for noise issues? If the bulkhead itself is 1.5' I would start by replumbing with the larger pipe.> No changes. One thing that I have noticed is that the right hand overflow starts spilling over a second or 2 before the left, meaning that there is not as much flow from that side. Maybe tank is not quite level. <It is easy enough to check for level, and you should. Remedy this problem if it is not.> Question is would slightly lower flow in one overflow cause this flushing effect? <It sound like you have a few problems here. First, since the right hand overflow is lower, it is having to flow more water than it should before the left overflow kicks in. Running an overflow past capacity is not only a recipe for disaster, but noisy while it lasts. The other problem sounds like siphoning. Do you have an aspirating tube in your Durso? This will let air in to break the siphon that will occur, causing flushing followed by the water coming over the top of the drains until the siphon starts back up, draining it back down and flushing again. The third thing I would check is your flow rate. With two 1' bulkheads I would limit the flow to 600 gph safely. Any more will be noisy and end up with water on the floor.> Mike Callaghan

Re: Overflow Noise 2/14/08 Thanks. The 1/8th inch airline fixed flushing problem. Only problem now is uneven flow between 2 overflows. Maybe adjust the height of the overflow slightly on the low one. Thanks again Mike Callaghan <Welcome, do check to make sure the tank is level first. Good luck, Scott V.>

AWFUL bulkhead gurgling. Overflow Gurgling 2/11/08 Greetings gang! <Wuf.> I am having an awful issue with gurgling. After a fun-filled weekend of trying to get my 65 gallon tank drilled (read sarcasm in this), I FINALLY got it done. <It is what counts!> I have 2-1" bulkheads installed, with a Mag 7 in sump. The return line is "T'ed" off into 2 loc-line outputs. The new setup looks a TON better than the previous clunky clear overflow box I was using, BUT I am having one last issue with it (go figure). <Growing pains.> My drain lines gurgle. And gurgle. And gurgle. No stopping it. And it's driving me NUTS. To be honest, I can't even leave it running for the fear of angering my neighbor. Yes, it's THAT loud. <Is it gurgling or flushing?> I know the air getting sucked into the vortex going into the tube is causing it, but I cannot get it to stop to save my life. I've shoved a piece of airline tubing in it to try and 'break up' the vortex, but obviously it didn't work (otherwise, I wouldn't be writing this!). Any suggestions would be great. I would like to be able to sleep without having to use ear muffs. :-( -wuf <Two things can cause gurgling/flushing noises. First is if the intake of the drain is exposed to the atmosphere. This will cause the noise of the water traveling through the line itself to be heard. This is why you see the PVC elbows pointing down on most overflows. The other is a siphon or partial siphon in the drain line. This will cause all sorts of noises, some sporadically. You will need to drill the PVC drain intake at the point that it starts going down to your sump for the airline tubing (I would actually get a bit larger tubing for this). Be sure to drill it to fit fairly snug. From this point you will want to slide the tubing up and down until you find a point at which it will eliminate this siphon effect. Good Luck, Scott V.>

Re: New Tank'¦Pump Size/Plumbing Options -- 01/03/08 Eric, <<Jason>> Thank you for your detailed response. <<Quite welcome>> It was very helpful. <<Ah'¦good to know>> In reference to item 4 below, I did mean to write that I was considering lining the tank stand with some sort of sound proofing. <<Oh!'¦very good then>> In car electronics, you can line the sheet metal behind the interior with matting called Dynamat that helps reduce vibrations and blocks the sound from going external. <<Mmm, yes'¦have seen this used in aftermarket speaker installations>> Was just wondering if something like this has been done in a fish tank and if so what kind of material would be used. Thanks, Jason. <<I've never seen it done, though I have heard discussions re. An acoustical tile or even foam-board insulation might do the trick'¦though you may find it's more effective to simply locate any offending pieces of gear and isolate/dampen vibration at the source (as in placing a piece of 'mousepad' under a vibrating pump). But do feel free to give 'sound-proofing the stand' a go, and let me/us know how it works out. Regards, Eric Russell>> Aqua C Remora, op./noise issue 12/15/2007 Hey guys, love the site. I have a 26 gallon bow front FOWLR. I bought an Aqua C Remora with the MaxiJet 1200 3 weeks ago because of the info I found on your site. While it seems to be working well, about a half cup of gunk every few days. My issue is with the noise, in the instructions it says the noise and bubbles will decrease over time but has not. Being that the tank is in my bedroom the noise can get quite annoying. Is there anyway to decrease the noise? <Mmm, possibly... by adjusting the flow, mix... or possibly switching out the pump (if this is the source of most the noise) for an Eheim hobby pump (MUCH quieter)...> Or would it be ok to put the unit on a timer, maybe 12 hours on 12 hours off. Would it still be effective? <Yes, might be the best idea here> And would it cut down the life of the pump? <Not appreciably> Thanks for your help. -Joe <Lastly, though it is not likely, this unit might be defective. If in doubt, do call on Jason or Steve at Aqua-C... they are both very customer service oriented... and fine young gentlemen as well. Cheers, Bob Fenner>

90 gallon noise maker... quieting 11/21/07 Hey Bob and friends! I've got a real quick two second question. I've searched the forum and couldn't find a clear and simple answer. I'm moving and have to put my 90 gallon salt FOWLR in the bedroom. I need a QUIET -powerful-low budget-low maintenance filter. I have a 18'' snowflake, orange toad, and a dogface. Needless to say, the water quality is less than optimal. But nobody seems to mind. I feed the puffer daily and the other guys twice a month. I currently have an old school hang on-overflow- wet dry, a decent skimmer, and two power heads with about 60 lbs. LR. Not adding any more fish, just more rock. Can you recommend a SUPER QUIET filter for my set up? My fiancÃ©e is already upset about it being in the bedroom....please help! Thx, Adam B. <Mmm, well, the most quiet units will be "contained" (i.e. sealed, low-pressurized)... My fave, the larger canisters... of SIZE from Eheim (I use these on my FW set-ups... and have for decades)... Whisper quiet and very dependable... BUT you will have to be careful re feeding fishes of these types, in this volume, AND clean the mechanical (filter pads) parts often... a pain at first, but not hard once it's routine... And the Eheim's consume VERY little electricity for what they do. Alternatively, you might consider building an insulated box of sorts to reduce the ambient noise for what you have... Bob Fenner>

Limiting Pump Noise'¦Large External or Tunze Stream? -- 09/26/07 Hello Crew! <<Howdy Don!>> I am in the middle of setting up a new saltwater 210 AGA. <<Sweet>> I went out and bought a Via Aqua 8000 to use as the sump and buy another one for a closed-loop. <<Mmm, have you heard these pumps run? I find this brand of pump to be very noisy>> It's an o.k. pump but a little noisy. <<Indeed>> I might be expecting too much and pretty much have read all your articles on power heads and pumps. <<Okay>> Do I go and buy either a Dolphin 7500/6500 for a closed-loop (or tell me what pump is awesome at being very quiet) <<The Japanese-motored Iwaki's, some of the Pan-World pumps, and those from Gorman-Rupp Industries are a few examples that will offer a good balance of quality and power vs. noise'¦but none are truly 'silent'>> or scrap the closed-loop and stick about 4 Tunze in the tank. I would love to run a closed-loop but much rather have a real quiet tank running. <<Then go with the Tunze Stream Pumps, mate. If you can live with the look there's absolutely no comparison re efficiency and flow volume, with virtually no 'noise'>> Thank you for your time. Don V. <<Happy to assist. Eric Russell>>

New Custom 120g...Wanting A 'Quiet' 2400gph Turnover Rate! -- 08/17/07 Wet web media crew, <<Hello Matt>> I have been reading nonstop for a couple days (there is a staggering amount of data on your website) <<Indeed>> and am trying to get the best configuration. I know I want the 48' wide tank; most likely 24' x 24' for the other two dimensions. <<A standard 120-gallon tank then>> The Lee Mar guys are the ones making the tank. The standard 48x24x24 has one 2' drilled drain then two 1 Â½' return holes in the back center overflow. <<Better than most...>> I do not think this is adequate so I must have them customize the tank. (Any suggestions here would be great, I want to get it right the first time instead of regretting a choice and be stuck with it.) <<Mmm, well...I need to know what your 'goals' are with this system to be able to afford much help>> I want to make sure that I have a big enough drain that it will be quiet and able to easily handle 2400gph, then add a second one as a backup and to supplement draining. <<Ah, okay...then I would have 'three more' of the 2' drains installed. This will give you about 4800gph 'maximum' capacity. This is a bout half what some folks/most drain calculators will tell you...but is a more practical number/expectation in my opinion. Even though four 2' drains will make your goal of 2400gph quieter/easier to plumb, processing this much flow through a sump just below the display will be anything but 'quiet'>> I think both drains could be in same overflow box. <<If you are considering a maximum of only two drains your goal of 2400gph of quiet flow 'may' still be attainable, but will require much tweaking/tuning to achieve. Perhaps you should consider a closed-loop to boost the water flow within the display and utilize a much smaller 'return' pump>> If I have read correctly a 2' bulkhead would be the appropriate size (making the drill holes ~3'). <<Not in my opinion...as stated earlier, I would plan on about 1200gph per 2' drain>> Would there be any advantage to drilling the holes in the back glass (still in the overflow) instead, or in addition to, the bottom glass? <<This is my preference...if only to limit the amount of water lost should a bulkhead fail>> Are my dimensions correct for drain sizes? <<Do consider my statements re>> With drains this size, would a stand pipe, such as the infamous Durso standpipe still be required to decrease noise. <<Likely, yes...and would need to be constructed of pipe of the same diameter as the drains to prevent loss of flow capacity>> Not sure about the whole closed-loop system. <<Is the 'better' option here I think...or some Tunze Stream pumps>> Given a big enough sump, any problem with that much flow through a sump? <<I think you will be surprised at how much noise 2400gph of water volume dumping in to a sump can make. Even if the sump is large (100+ gallons), it will be a challenge to quiet the noise and control the turbulence/bubbles>> Is there any disadvantage to having 3-4 extra holes (in each of the corners of the tank) in the bottom to have available for return flow and cap any not in use? <<Of course (NOW is the time to drill these)...and I would not 'cap' these but rather utilize them without increasing the flow rate to help reduce noise/plumbing issues. The more drains available...means fewer gph per drain...means fewer hassles all around>> I would like to use as few powerheads as possible for adequate flow and still be able to keep SPS. <<Can be done, though I find the Tunze Stream pumps to be very quiet, very efficient, very flexible in their application, and quite worth the 'intrusion'>> I appreciate your time and will be purchasing the tank in the next month. If you have any suggestions or ideas for this tank, please feel free to add any suggestions. <> Thank you, Matt <<Happy to assist. EricR>>

Re: New Custom 120g...Wanting A Quiet 2400gph Turnover Rate! -- 08/22/07 Eric or other expert, <<Just Eric here'¦>> I have revised my plan to incorporate the response from Eric into my tank. Attached is a schematic of the tank-in-progress. <> Would it be better to 'T' the two corner holes for the intake of the closed-loop then 'T' the two middle of the tank returns for the return then just use one bigger pump? <<With the configuration shown (if I understand/interpret it correctly) I think you will have better control/efficiency utilizing a separate pump for each as you show. Though I suggest you swap the ball-valves for 'gate-valves' (more control/finesse), and move them to the 'output' side of the pumps (you don't want to 'starve' the input side of the pump)'¦and I would even consider up-sizing the pumps to a Mag-9.5 to allow for future loss of flow as the bio-film builds up in the inside of the plumbing>> The current plan is to use a 30-40 gallon sump with a Mag 18 return, theoretically giving around 1200 gph through the sump. <<If utilizing the two 2' drains in the diagram to feed the sump'¦excellent>> The refugium will be a separate 20 gallon tank that utilizes a powerhead to get water into the refugium and is gravity fed back into the sump. <<This will work fine'¦though you could add a tee off one of the drains to feed the refugium as an alternative (regulated with a valve)>> Do you see any obvious, or not so obvious, problems to this design? <<Not thus far>> What is your opinion of the devices that rotate flow between returns (i.e. Ocean Motion)? <<I haven't used these myself but have a friend in the trade who uses them extensively with his customer installations. The devices seem to be well made and he 'swears by them.' I think they are worth your further investigation if you are interested in regulating flow thus>> Thank you for your continued assistance. Matt Jenkins
<<Always happy to help. Eric Russell>>

Plumbing/Water Noise Hassles...Big Drains With Lower-Than-Maximum Flow Rates Are Key -- 08/08/07 Hello Eric, <<Hello Faisal>> Hope you are fine. <<Yes my friend, thank you...and I must share with you...temperature is expected to reach 104F here today with heat indexes exceeding 110F! Not the 122F you're experiencing, but still...ugh! [grin]>> I have a question about the size of the Durso standpipe. <<Okay>> If you still remember that I have an upstream refugium (100" x 20" x 20" / 164G) with 7" DSB & Chaetomorpha. <> The main tank (100" x 32" x 28" / 370G) will have 2 overflow boxes. I was planning to have two 2" Durso standpipes & two 1.5" returns but I have been told that these sizes/flow rates would be hard to keep quiet. <<If you 'max-out' the flow capacity of the 2' drains then I would agree. But if you utilize a pump that gives you about 1200gph-1500gph after head loss you might find this configuration to work/be quite 'manageable'>> On the other hand, I have been advised to use two 1.5" Durso standpipes & two 1" returns but then, through readings, I understood that these won't be enough. <Depends on what you are 'after' I suppose. This configuration could also work, though you would probably want to limit this flow to 1000gph-1200gph en toto for the two drains>> I know that the turnover between sump & display is not as important as the in-tank turnover. I am planning to have a closed-loop circulation & I already have 2 Tunze Stream (3170g/h each) & 2 Tunze Turbelle Electronic (1270g/h each) on a Tunze Multi-Controller. Also, you have advised me to have around 600 g/h through the upstream refugium down to the tank. So with all these inputs what Durso standpipe size should I use. Note that the tank will be SPS dominated tank (I hope) and an in-wall design (regarding noise from the Durso standpipes). <<Either configuration you have described will work... Considering you are providing sufficient water flow by other means, 'I' would likely go with the 1.5' standpipes/bulkheads to allow using smaller overflow boxes and keep the flow from the sump to the tank to around 1200gph (after head loss) to ease noise/plumbing hassles>> As always, your insights will be appreciated. Thank you & regards, Faisal Abbas <<Always a pleasure to assist...stay cool! Eric Russell>>

Noisy Eheim Pro 2028 7/8/07 Hi I have purchased a 2nd hand [had been used for 6 months] Eheim 2028. <A very good product in my estimation: http://www.marinedepot.com/md_viewItem.asp?idproduct=EH2028K> It works perfectly but seems as if air may be present as it 'rattles' when the taps are fully open. If I partially close the taps the noise stops. Is this normal? <No> If not how can I dispel any remaining air? <Mmm, a few ways, but the most assured is likely to turn the power off, disconnect the discharge line, and have it lowered into a bucket, allow the water to drain/siphon through the unit... perhaps while giving the filter itself a few gentle shakes side-to-side to dislodge any air caught in the pump... If you can get a friend to help, watch the lines/water, try turning the pump motor on/off a couple times during this process...> Thanks Alan <Welcome. Bob Fenner> Hang-On Overflow Noise (Water Volume vs. Pipe Diameter) -- 05/14/07 I just upgraded my 29 gal reef to a CPR100 overflow and draining into a 10 gal sump. I decided to hard pipe the overflow in with 3/4pvc and two elbows. No matter how I position the straight down tube into the sump sock I get the constant sucking and releasing sound in the box. <<You are likely trying to push too much water through the overflow. The 1' bulkhead that comes with the overflow will only handle about 300gph (yeah, I know they are rated for more flow...just not practical), by reducing the output diameter to Â¾' as you have done with the PVC pipe you have reduced the flow capacity even more to about 150gph or so...which is more than enough, by the way, for this tank/sump combination in my opinion>> Will the Durso pipe solve this problem of noise? <<I have seen what looks like a modified/compact version of the 'Stockman' standpipe for hang-on overflow boxes (see here: http://www.aquariumlife.net/projects/diy-overflow/74.asp), but whether or not it will help is probably a matter of trial and error. It may help smooth flow a bit but if you are getting a surge effect as you describe you will probably have to back off on the pump output from the sump (easily accomplished with a gate-valve plumbed in-line after the pump)>> Even if I put the sump pipe under water it still makes and ton of noise and I am really trying to understand this problem. I want the tank to run with the least amount of noise as possible and the splashing in the sump will be easy to fix if I can get the overflow to stop sucking and making gurgling noises. Any other suggestions? Thanks. Will <<Definitely sounds like a case of too much water volume coupled with a too small throughput diameter to me. Regards, EricR>>

Re: Hang-On Overflow Noise (Water Volume vs. Pipe Diameter) -- 05/15/07 Question regarding the 3/4 PVC. <<Ok>> I am trying to get some clarification on what sizes I have used. <<...?>> The 1'' bulkhead accepts a schedule-40 3/4'' connection piece and then goes to 1" elbow. <<Mmm, no...the 1' bulkhead will utilize 1' pipe/fittings...a 1' ell will require 1' pipe. If you have used Â¾' pipe then you either have Â¾' fittings and bulkhead, or you have use 1' to Â¾' reducer fittings>> I noticed that the 1" PVC pipe is the same size as Â¾' fittings. <<The outside diameter of 1' PVC pipe is very close to the outside diameter of a Â¾' PVC fitting, yes...but in no way are the two compatible without the proper reducer fittings>> Why is this. <<The Â¾' fitting must be large enough to fit around the outside diameter of the Â¾' pipe...and a 1' fitting for 1' PVC pipe is noticeably larger by comparison>> Basically I am saying that 1" pipe fits in 1'" bulkheads but the 1" is really Â¾' in order to fit in that space. <<No...>> This is confusing to me and makes me wonder what size I hard piped mine in with. Please advise. <<If you used 'all' 1' PVC fittings and pipe then figure your flow based on a 1' diameter drain...if you used Â¾' pipe or fittings (even just one) in combination with the 1' PVC pipe and fittings, then figure your flow based on a Â¾' diameter drain>> Also my Mag 5 with head pumps about 300 gal/hr and I was wondering if the gate-valve would be alright to use to restrict flow from the pump? <<Absolutely...the way these magnetic pumps are designed/work makes them very compatible for use with a gate-valve for tempering flow>> Thanks for your help. Will <<Happy to share. Eric Russell>>

Excessive Noise From My Tank Plumbing -- 02/28/07 Hello, <<Howdy Todd>> I've been reading a lot on the plumbing noise on your website. I have a 225-gallon 72x24x30 tall with two overflow boxes 1 on each side of the tank, each overflow has 1-1'' drain and 1-3/4'' return. <<Ok>> I'm using Durso pipes 1 1/4". I have a Mag 9.5 and a Mag 1800. <<For return pumps?...this is more flow than two 1' overflows can handle...>> The 1800 is pumped from one side of the tank to the other, that's why it's bigger to make up for the travel; the 9.5 return is pretty much straight up. <<Even so, a 1' overflow will take about 600 gph of 'gravity' flow under ideal conditions (most folks find it easier to limit this to about half the max 'posted' rate). Either you have these pumps greatly restricted (head pressure), or the overflows are larger than you think/stated, I suspect>> Wondering is there is anything I can do about that ever so common that I've been reading about loud water-flow noise through the pipes and into the sump? <<Did you plumb gate-valves (recommended) on the output side of the pumps? If so, try closing these a bit until the noise abates and see what kind of flow you have>> I've tried the aspirating thing, putting an air tube through the top of the Durso cap down the pipe any where from the top to the bottom of the overflow and that really didn't help at all. <<Mmm, yes...is only a piece to the puzzle...and never a panacea on its own>> Does the air line need to go farther down into the drain pipes? <<Hard to say as each installation is unique. I can only stress this does take some experimentation, with both the tubing length AND tubing diameter...perhaps a larger diameter tubing will make more difference>> I've tried 1" and 1 1/2" PVC pipe from the bulkhead at the bottom of the Durso pipe to the sump and both are loud. Most of the drain pipe is vertical and horizontal, would it make a big difference if it all was a little bit sloped? <<As in replacing 90-degree ells with 45-degree ells?...possibly>> I replaced the PVC with rubber hose and that did help quite a bit but still a little noisy and the hose wants to kink, is there some good non-kinkable hose out there anywhere? <<Look for some flexible PVC, commonly referred to as spa-flex and found at pool/spa retailers as well as Lowe's and Home Depot>> And the fact I don't feel safe from leaks like I do with PVC. <<The spa-flex 'is' PVC and uses the same fittings/gluing technique>> I think it's quieter with the hose because it's all smooth on the inside and the bubbles and water aren't hitting the edges of the PVC fittings. <<Turbulence is a factor, yes>> I've read a lot on you guys saying to increase the bulkhead size to like 1 1/2" or 2". <<Is preferable, yes>> I'd hate to re-drill cuz the tank is brand new, but if it would help? I will do it?!!! <<Increasing the size of the throughputs would ease the plumbing noise/issues with the drains (considering you keep the same return pumps), but you will likely still have issues with noise in the sump from trying to process all that flow>> Would I use all the same size pipe to match the size of the bulkheads? <<Preferably, yes>> What kind of hole-saw do I need to buy for the 1/2" acrylic? <<Any woodworking hole-saw will do, though the 'bi-metal' hole-saws work best in my experience. Drilling acrylic is not rocket science, but if you decide to attempt this...practice on a piece of scrap to get the hang of how fast/slow to run the drill as well as practicing backing out the 'running' drill to let things cool every few minutes. The last thing you want to happen is having the hole-saw 'stick' in the hole because you got things too hot and then stopped the drill in the hole>> The noise is definitely from the drain pipes and sump entry. <<You can try placing 45- or 90-degree ells on the ends of the drain pipes and submerge these below the water line...but I really think your problem is just too much volume/flow for the drain size>> By the top of the overflow where the Durso pipe tops are it's super silent and working perfect. <<Ah...no suction/surge noise then...hmm>> I want to get rid of the water and air mixing crashing sound but I don't want to get rid of my Dursos!! <<Indeed...though you may have to build larger standpipes to fit the new fittings if you up-size the bulkheads>> What do you think I should do??? <<Honestly, I would use smaller return pumps with plumbed gate-valves to control flow and look to alternative methods for increasing water flow within the tank>> I was going to have a custom tank built of this size with 2-2" drains, but I got a pretty good deal on this one. <<Understood>> I have learned so much from your website already!! Thanks so much, you guys are great, you have made things so much easier for me!!! But I'm stuck on a noisy one!!! <<Happy you have found the site of use in the past...and no doubt this issue too will come to pass>> Thank you so much, Todd <<A pleasure to share. Eric Russell>> Re: Excessive Noise From My Tank Plumbing -- 03/01/07 Hello again, <<Cheers Todd>> Thanks so much for your time Eric. <<Quite welcome>> Just a few more questions for you. <<Ok>> If I set up separate flow for a large amount of water movement inside my tanks with like closed-loop systems (I have a 225-gallon FOWLR and a 120-gallon reef, both will eventually be pretty heavily stocked), how many times should I be turning these tanks over through their sumps (skimmer, charcoal, heater and refugium)? <<Some two to three times the tank volume per hour should be fine>> You don't prefer a filter pad or sock in either type of tank do you? <<Not myself, no...though some folks do use them with good result. Main thing to keep in mind re these items is to keep spares and replace/clean them once (at least) or twice (better!) each week>> My last tank was a 55 gallon, I set it up with a valve on the drain line and matched the flow of the return line, the 1" drain had no riser pipe, I just set the drain and return water flows to equal and the water level stayed at about the teeth. <<Dangerous to put a valve/restriction on the drain line in my opinion. An errant snail or just the build-up of mulm/bio-film can cause a flood>> I had a separate safety drain with standpipe set at the top of tank so it wouldn't overflow, cuz the water would after awhile go up (start the sucking noise) or go down ( the water crashing noise). <<Indeed>> Then Id' take 5 minutes and set it again and it would last another 3 or 4 weeks. So it wasn't as nice as the Durso but it wasn't that big of a pain. So is there enough gas/air exchange down in the sump with an open top and skimmer, or maybe also an air stone? <<No need for the air stone (let's not create any 'micro-bubble' issues), the skimmer will oxygenate the water just fine>> Or the main display with an open top, with water flow making surface movement? <<This helps greatly with gas exchange>> Or do you need that air sucked through and/or the 1" water fall over the teeth like with the Durso, for gas/air exchange? <<Not necessary, no>> I like the Durso, it's just so loud with the air turbulence, with this set up no air was being pulled through the drain (it was a super silent set up). I also only had like 5 small fish though also. Do you know if that Tenecor silencer that sits on a stand pipe works just like the Durso, pulling lots of air down the drain? <<I'm not familiar with the Tenecor silencer...you might do best asking about this on the message boards (RC, reefs.org)>> Thanks again, Todd <<Regards, EricR>>

R2: Re: Excessive Noise From My Tank Plumbing - 03/02/07 Hello again Eric, <<Hey there Todd!>> On my 225g I tried the flex pvc and it quieted the drain quite a bit. <<Ah yes...the thicker and more resilient walls of the flex-PVC can make quite a difference...and being able to make 'gentle' turns doesn't hurt either>> Thanks! <<I'm happy you're pleased>> I tested my flow rate and my 1800 and 9.5 Mags and they are only pumping 600 gallons an hour. <> The return lines are not anything special, just 3/4 pvc with 2 90-degrees to each overflow and 1 90-degree coming out of each overflow. <<Hmm...is likely the Â¾' return line causing the bulk of the head-loss with these pumps>> But that's 2 to 3 times turnover rate, and like you said that should do it. <<Yes...and just to clarify for those reading this...this particular 'turnover rate' is in regards to how much water is passing through the sump for filtration purposes and not to be confused with overall water flow within the display tank>> I'm going to try those Tunze wavemakers for my water movement inside the tank, they look like they work pretty well. <<Indeed they do. I use the Tunze Stream pumps for flow in my 375g reef...you won't be disappointed>> For my FOWLR 225G do you think all I need is 2 of the constant running powerheads like the 6060 or 6080, 1 on each side of the tank, or would you go with one of the controller sets that turn them on and off? <<Either a pair of 6080s or a pair of 6100s w/controller would be fine (though the 'electronic' units give you much more flexibility). I use a couple 6080s AND a pair of 6100s in my system>> What about on my 120G reef? <<A pair of 6060s or a pair of the electronic 6000s would be a nice addition...in my opinion>> Or what do you think about that Tunze box wavemaker? <<Big, obtrusive, expensive, and very limited as to its placement in the system...but those that use it do rave about it>> It seems like it would work pretty good too. <<Your call mate>> Thanks again for your time and info Eric! <<Happy to share Todd>> Both my tanks are in wall tanks, I just bought my first home a few months ago, so I've been waiting to do these tanks forever! <<Ah, very nice...mine too is an in-wall system...love that look...>> My 225G FOWLR is going to be set in a black rock wall, like on a fireplace. <<Very nice! I used a fossilized reef rock (lots of gastropod and bi-valve shells) to face the wall around my tank>> And my reef tank is going to have a black acrylic frame going around the tank. <<Mmm, yes...gives a very 'finished' look to a tank when dressed this way>> Can't wait till I get them done!!! <<I'll bet...but don't rush it>> I'll send you some photos when I get them finished. <<Please do!>> Thanks again for the info, Todd <<Quite welcome, EricR>>

R3: Excessive Noise from My Tank Plumbing - 03/02/07 Hello again Eric, <<Howdy Todd>> Just curious but what do you use for your 375G reef filtration, what do you have for the turnover rate through those components? <<Mmm, okay... I have a 75g sump that is fed water directly from the tank to the skimmer chamber; housing a Euro-Reef CS12-3, by two 1" overflows with a third 1" overflow feeding a 55g downstream vegetable refugium that empties to the pump chamber of the sump. Two DIY hang-on chemical reactors in the sump hold Poly-Filter and iron-based phosphate media. A Mag-12 return pump provides circulation through the sump, passing first through a chiller located in the crawlspace under the house, and thus providing about 800 gph of quite manageable turnover to the sump. Ancillary flow in the tank is provided via the Tunze Stream pumps as previously stated>> Thanks again for the info Eric; I'll leave you alone for awhile now. <<No worries mate...is why I am here>> Take it easy, Todd <<And to you in kind, Eric Russell>>

R4: Excessive Noise from My Tank Plumbing - 03/04/07 Hello again Eric, <<Hiya Todd>> I guess I have one more question for you now that I have read your last email. <<Ok>> I see that you're getting 800 GPH from your Mag 12. <<About...yes>> I have a Mag 18 and 9.5 and am only getting like only 600 GPH!! Hmmmm!! <<Indeed...and tis why I noted earlier, there must be some unusual head-loss due to your plumbing configuration>> I'm not doing something right here? <<Something seems to be amiss for sure>> I'm still testing with a Tupperware sump before a have my acrylic one built. So right now the sumps right in the center below the tank, each pump is using 3/4 pvc, one union after pump outlet, up 2 feet, a 90-degree, over 2 1/2 feet, a 90-degree, up 5-inches to bulkhead, then up 30 inches to top of overflow, 90-degree out of overflow, centered-tee split into 2 6-inch sections of centered-tube with 3-inch flared nozzles on each end. Each pump is plumbed separately to each one of the 2 overflows with the exact same plumbing right now. <<Mmm, well Todd, with the ells, tees, and run lengths, I figure your restrictions equal "at least" 11-feet of head-height on each pump...which "should" still give you about 1100gph en toto (approximately 300gph from the Mag-Drive 9.5 and approximately 825gph from the Mag-Drive 18). But there's more at play here...I think the reason you aren't realizing even this much flow is due to the 3/4" piping. It has been my experience with this brand of pump that one can get better flow volume by "upsizing" the pipe on the output side of the pump (I use 1" flex-PVC for my return line). If you can, increase the size of the throughput at the tank as well...but even if you don't, just increasing the pipe diameter from the output of the pump will help. Also, try reducing the number of 90-degree ells in your plumbing. Either use two 45-degree fittings to replace a 90-degree fitting...use "long-sweep" 90-degree ells (usually found in the electrical section of Lowe's/HD...and are expensive), or use flex-PVC in place of the hard pipe>> And I do have one of those 3-inch long strainer fittings on each of the pumps intake so nothing gets pulled in, they're those small ones, not like some of the bigger ones that I've seen in some of the photos of Mag-Drives. <<Shouldn't be an issue here...but neither are they necessary for a sump installation, in my opinion>> So it's not like I'm plumbing 20-feet with lots of 90's. <<Oh, but it is my friend...all things considered>> I'm going to try the flex pvc on the returns to see if that helps. <<Am sure it will...especially if you get/put an adapter bushing on the pump and use 1" flex>> The pumps are fairly new so they should be operating fine. <<Yes...just working them too hard>> How do you have yours plumbed? Are you using bigger then 3/4" line? Flex pvc or tube? <<1' Flex>> Any kind of centered tubing entering the tank with nozzles? <<"Tee" fittings? '¦no>> Or anything on your intake of the pump? <<No intake screens either...>> I'm stumped and just don't get it! <<Read over my replies...should start to make sense. And give me a shout if you still have questions>> Just thought I'd get your input before I took the next trip to the hardware store! <<And now you have it>> It took me about 10 trips to get the drains the way I wanted! <<Ha! I do understand...I made many a trip as well when I did my own tank installation>> I'll see if I can do the return in 5! HaHa! Right now just one of my two overflows by itself with 1- 1" bulkhead and its 1 1/4" Dursopipe will handle the Mag 18 and 9.5 (600GPH). <<If a bit noisily, yes (isn't that how this exchange began? [grin])>> I surly thought I'd be getting much more return then that, as I think I should be!! <<Agreed>> My wife keeps making fun of me for checking my email so much after I ask you a question. <<Hee-hee!>> It's like I'm a little kid waiting for Christmas morning when I'm waiting for fish info! HaHa! <<Well then...I'm glad I can provide a bright spot to your day!>> She keeps on making fun of me saying "Oh I suppose you got to go see If the fish guy emailed you yet?" You're now the fish guy! <<Could be worse [grin]>> I you have any pics of your 375G or other tanks you have, I'd like to check them out if you wanted to send some pics, your 375G sounds like a really cool setup!! <<Thank you...but don't have anything recent to share'¦though yours is not the first request re'¦perhaps I should take/post some pictures for sharing with those interested to see such. I did have some installation pics from a few years back posted on the local marine club website, but that server seems to be down>> Thanks again for all your time and info; your thoughts are greatly appreciated! Todd <<It is my pleasure to share. Eric Russell>>

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