Hello all, I was wondering if any of you have any experience with sound proofing a canister filter. I currently have my canister filter in a cabinet under my 180 gallon fish tank. I have already hanged carpet inside the walls in the cabinet, but that only helped just a little bit. It seems that most of the sound the canister is producing is low frequency sound. I think I am going to build some kind of structure around the canister filter to block the low freq. sound coming from it. Anybody have any suggestions on material I should use? Or any other tips?