tanks with sumps in stand

Mine was quiet. Most noise comes from the top side of the drains drains if you don't have anything to silence them. Do your research to learn from others mistakes. Under the tank is best use of space. If you have basement space you will be much happier to have space for maintenance.

 

My New 100g build: water flow is near silent to start with & with the doors shut I can only hear the soft soft vibrations from the pump. As far as flooding goes I sealed all around the bottom of the inside of the stand.. If the sump floods water only comes out the front of the stand. (Easy cleanup) All of my stand is primed & painted with oil based hi-gloss from sherwin Williams. I like my stand build because it lets me inside easily, plenty of clearance between the sump top and tank bottom as well!

 

i sit right beside miy 120 in my living room,i have a dual pump skimmer and my return pump and a reactor pump all running 24/7.all i can hear is my wifes bubbles in her fresh water tank 10 foot away lol.

 

How do you quiet down a noisy overflow? Or I guess what's the most quiet way to plumb it? I've got dual drilled 2" returns coming from an overflow box and it's pretty noisy. Like running water.

 

If they are just open pipe, you need gruves cut in the top of the pipe. I used my table saw set at 1" and that worked really well. Then you can put a cap on top with a vent hole for air syphon. And if you want to silence it further you can make a PVC capsule air silencer just like what your skimmer has. If you don't make a syphon hole there will be an occasional gargle of air getting pulled from under the cap through the gruves.

There are other ways. Herbie's are one.

 

I use the herbie! And you asked about silencing the water flowing into the sump: check out my photo, the 3/4" drain pipe is submerged into a larger capped 2" pvc pipe, so water is essentially flowing into a tube and being pushed out over the top and onto a platform tray with filter sock holes in it. This is the way to go if you want to use socks & have complete silence.

 

Some water noise all part of having a aquarium. I have a 73 gal bowfront that isnt drilled. Using a hangon CPR overflow and a under tank sump. The parts the overflow came with made alot of gurgling. I googled and made a device with a pvc pipe with holes drilled in the side and a coupler slid over it so the water flows over the top and into the holes. Hole drilled in the top with a small piece of plastic tubing. Its quiet most of the time except when it cames some air. All is pretty quiet slight hum from pumps, the return hose was touching the sump and causing vibration, I put some foam around it. Id say the noisiest part is the wavemakers but I have probably too much flow, water sloshes pretty good sometimes.