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Old 01/15/2007, 04:35 PM   #1
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Teknagen's Avatar
Join Date: Dec 2006
Location: Lake Forest
Posts: 234
help too much water noise

Ok I have my tank setup and filled with water.

The water draining out of tank isn't a constant stream of solid water as I suspected. Is this normal?

..And every couple of minutes the water draining out of tank into sump, makes a loud "flushing" sound. Is there a way to prevent this flushing effect?

No camera available but I've attached an drawing of my water drain.

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Old 01/15/2007, 05:10 PM   #2
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Join Date: Oct 2001
Location: Atlanta, GA
Posts: 7,384
You can add a baffle to the sump to help deaden the noise.

When you find yourself in "Deep Water" it's best to keep your mouth shut!

Current Tank Info: 65RR Cube Mixed Reef
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Old 01/15/2007, 05:35 PM   #3
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Join Date: Nov 2006
Location: Milton, Pa.
Posts: 168
in the top of the "T", on the outside of the tank, is there a hole?

.....its all about the water

Current Tank Info: 36 gal bow front, aqueon pro flex 1 sump, asm mini g skimmer, aquaticlife 4 bulb t5ho, reef octopus overflow box, RKL controller, foam/rock back wall.
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Old 01/15/2007, 06:21 PM   #4
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Location: Wheatland Ca.
Posts: 399
if there is a hole, you need an aqualifter. They suction all the air out and maintain the siphon.

29g BioCube, Saltwater
85 Gal Hex Fresh Water
100 Gal Corner Salt Water

I Golf, I Party, I Work, in that order!

Current Tank Info: Fresh and Salt! I go both ways!
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Old 01/15/2007, 06:38 PM   #5
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Location: Milwaukee, WI
Posts: 614
Actually, the drawing shows a pure gravity overflow, no syphon is needed.

In fact, if it doesn't have a hole, a syphon will be forming and breaking, with the sucking noise coming when the syphon is broken. This is like the surgin phenomenon in a Durso standpipe: if the pipe can't keep up with the return pump, the water level will rise. When the water level gets over the pipe, no more air will be let in, forming a syphon. A syphon will move more water in the same pipe (because there's no longer any air), so the water level drops below the top of the pipe, braking the syphon. Air is then sucked in, causing the flushing noise.

You really want a weir box on the inside there, so that you do more surface skimming, but to kill the noise, you could try putting an elbow on the inside of the bulkhead, pointed down. Then a small airhole in the top of that T will allow the water level to remain even and above (by an inch or so) the opening of the elbow. That would be a variant of the Durso (go to and look at "External Overflow" under "Popular Modifications" for something similar. The bottom of the "Build your own Standpipes" page has a faq explaining the flushing effect I tried to describe above)

Asking dumb questions since '06!
Or, a dumby asking questions since '06!

Current Tank Info: 29G FW, 75G LPSing
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