On Friday I bought a 140G Gallon tank that came with two AC 300s, and I am also running a xp3. The tank is literally less than 5 feet away from my bed and was wondering if anyone has tips on how to reduce the noise the AC 300s make? I have cleaned them well and made sure everything is put together right but I still can't seem to get them quiet enough. I have a AC 300 on my 55G and it used to be in the same room and was much quieter than these ones. Could it just be the age of them?