Cichlid-Forum

EQUANT;

I agree with other poster...I'd put foam (at least one, maybe two layers of the foam in video) on each of the hard surfaces (including roof) in that cabinet to "eat" up the noise...and while you're at it, I'd close the back opening with multiple layer of foam also...remember that any hard surface will otherwise reflect the sound.

Cheers from Connecticut!

Late to the show but thought I'd throw out an option...
I have an Fx4, and by itself it's quiet. Really quiet. (Your Fx6 should be too). But I have a completely open back to my cabinet so even the slightest noise / vibration can be heard.

I use a cut sheet of NBR (Nitrile rubber) / PVC insulation. Typically this is used to wrap commercial ducts, tanks, pipes, etc. Think - the copper pipe insulation you get at the big box store, not the foam but rubber type, only in a sheet.

I use 1 (one) inch thick, as it will compress a lot especially under a water filled Fx4/6. Compresses about 75% under the pressure points (feet) of the canister. You can find it via a search, 36x48x1 for maybe 40 bucks.

My filter is now is completely silent. To the point of me having to look at the outlets / surface agitation to make sure it's even running. Does wonders for an air pump or anything else on it and does NOT absorb ANY water.

Here's my experience having bought 2 FX6s from Petsmart for $250/each with their in store only sale. Unfortunately I returned them both for they are just too loud in my living room. I thought the 1st one was a lemon but no. It's not just the low pitch hum which I can tolerate but there's some distinct higher pitched vibration sound from the motor itself. I really wanted to keep it since it's such a good deal but had to settle with an FX4 which is much quieter compared to the FX6. There's still the normal hum but you're talking around 45dB vs 60+dB as measured next to the motor with a dB meter app. I can see keeping the FX6 in the basement out of the living quarters but not in my living room it'll drive me nuts.