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Old 05-10-2006, 01:57 AM   #1
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Tank Noise

We are starting our first tank, and am so excited!! We added the water, sand and live rock and started the cycle, but it sounds like a toilet... I didn't expect it to be silent, but I didn't expect it to be loud either.

Tank Specs:
120g
ASM G3 Skimmer
Mag 9.5 pump
30g fuge
110w VHO 4 light system is on its way


If only the toilet noise would go away..... Any ideas? Or is this just something I'm supposed to get used to...
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Old 05-10-2006, 02:10 AM   #2
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Well the pumps are whats loud. Ive never used Mag ( is that your return pump? ) And im not sure what pump is on that skimmer. Any powerheads?
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Old 05-10-2006, 04:41 AM   #3
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what are you using for an overflow?
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Old 05-10-2006, 09:44 AM   #4
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Google on Durso Standpipe. Complete instructions on how to build them.

I'm thinking the overflow boxes and the subsequent waterfall is the noise you're describing. The standpipes will result in a water fall of about an inch or so in the overflow box and will make a huge difference in that noise.

Also, the lines dropping water back into the sump/fuge. Are the pipes or hoses submerged? That'll help the noise also - and of course gott aensure you have a siphon break at the top of that line so it dosn't suck fuge/sump water back in case of a poiwer outage.

I got a mag 12 and 2 mag 7s running and I don't hear any toilet noises. Really not much noise at all from them.
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Old 05-10-2006, 02:31 PM   #5
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Quote:
and of course gott aensure you have a siphon break at the top of that line so it dosn't suck fuge/sump water back in case of a poiwer outage.
you'll never have a back-siphon that sucks water out from a sump/fuge (provided it's below the main tank).

back siphons are only a concern on the return line from the pump where it enters the main tank again.
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Old 05-10-2006, 03:10 PM   #6
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Although I have dursos on mine, when my valves aren't set right, I get the toilet noise too.

My return line has a ball valve on it and all I have to do is turn it down a little to get the flow just right and the noise goes away.
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Old 05-10-2006, 07:59 PM   #7
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you can always get rid of the noise by turning the ball valve, but it's at the expense of decreasing flow.

You need to work on the overflow side and try to get that as quiet as possible in order to keep your potential flow maximized.

When you eliminate the noise by closing the ball valve, you are slowing the flowrate down enough to allow the overflow to "pour" the water through the plumbing. The noise comes from forcing water through the plumbing from a siphon. This causes air to be sucked in as well and gives you the gurgling toilet sound.

Options to help reduce the noise:
- restricting air intake by finding the right sized hole
- standpipe height (this will help with the build-up and flush cycle effect)
- adjusting the depth that the plumbing is underwate where it enters the sump (aim for <2")

Also, eliminating right angles on your overflow plumbing may help as well (use two 45's instead)

HTH,
Ryan
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Old 05-11-2006, 12:49 AM   #8
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We have two 160 power heads on the way. The overflow is built into the tank.

Moving the tubing around made a huge difference! There is still a toilet noise and I think the stand pipe may solve it. I'll send my husband to the store to make a stand pipe, and I'll keep my fingers crossed that it works...
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