Silencing overflow w/o using a durso standpipe

[Bars]

Unfortunately I have a very narrow overflow chamber with a single standpipe. It's how I bought the tank and sump a year ago. Lately I've been eliminating tank noise and the only thing left is the overflow noise.

Both where the water enters the pipe in the tank and exits in the sump creates a lot of noise. Gurgling on top (or water falling in the pipe) and massive amounts of air being dumped in the sump or something. I do not get a nice flow of water exiting the pipe either, seems like it's mostly air.

My question to you good folks: how can I (greatly) reduce the noise without making something like a durso pipe? I have about 1.7'' space around the standpipe.

 

[GlassMunky]

You could try this:

 

[Bars]

You could try this:

Ha, I literally just found that video!
Seems like a good solution, I'll definitely give it a try

 

[nereefpat]

With those single standpipes, it's really tough. My answer would be to slow down the return pump with a gate valve (or even a ball valve). Just a couple times an hour through the sump is enough. Then get flow in the display with powerheads.

What is the tank size? Pipe diameter? What flow are you pushing through the overflow?

 

[Montiman]

I would use a maggie mini if you aren't in the mood for the DIY. Don't think any sponsors sell them but they can be found online.

Maggie Muffler - Most innovative Aquarium Silencer Ever Made

www.maggiemuffler.com

 

[Bars]

I would use a maggie mini if you aren't in the mood for the DIY. Don't think any sponsors sell them but they can be found online.

Maggie Muffler - Most innovative Aquarium Silencer Ever Made

www.maggiemuffler.com

I actually have one of those, came with the tank. Whenever I put that thing on it makes the noise 10 times worse. Right now I only hear water loudly falling down into the pipe, the muffler however creates a horrible slurping sound.

 

[Bars]

What is the tank size? Pipe diameter?

45 gallon with a 0.8'' pipe,

What flow are you pushing through the overflow?

I... Don't know Is that simply combined gallons/hour of all powerheads and return?

I'll turn down the return a bit as well. Don't need it anyway for flow in the DT.

 

[Montiman]

Sounds to me like your return pump is too large. A single 1in drain is best with no more than 4-500gph of flow from the pump. What return pump do you have?

 

[Bars]

Just checked, I've got a Jecod DCP 6500, 1700 gph return pump (got it for dirt cheap, didn't bother checking if it was oversized). It's not running at 100% though. The manual isn't very helpful, so I'm not sure at which % its running. It's set at F50 (assuming F stands for flow), which starts at F30 (at which point it isn't pumping any water at all) and ends at 100. Just turned it down to F40, added the muffler and that GREATLY reduced all noise.

 

[nereefpat]

I... Don't know Is that simply combined gallons/hour of all powerheads and return?

Just the return pump.

Sounds to me like your return pump is too large. A single 1in drain is best with no more than 4-500gph of flow from the pump.

Yes, if even that much, if you want it to be reasonably quiet.

Just turned it down to F40, added the muffler and that GREATLY reduced all noise.

Excellent. Reduce return pump flow, and add muffler.

 

[Bars]

Slowing down the return and adding the muffler was the way to go, barely any sound at all! New problem however. With the muffler the water surface isn't skimmed. Any way to fix that?

 

[Montiman]

Slowing down the return and adding the muffler was the way to go, barely any sound at all! New problem however. With the muffler the water surface isn't skimmed. Any way to fix that?

If the water surface isn't skimmed the stand pipe is too high in the weir.

 

[Bars]

If the water surface isn't skimmed the stand pipe is too high in the weir.

Mm, alright. I'll cut a small piece off then. Thanks