I have a Tetra 10 whisper and a tiny little airstone in my 5gallon Betta tank. I have the following airstone in my tank: http://www.amazon.com/Elite-1-Inch-...QHC8/ref=sr_1_1?ie=UTF8&qid=1334604627&sr=8-1 The whisper is fine, but the airstone makes a bit of noise and I'm wondering how I can lessen the airstone noise?? I have a gang valve in place to control the pressure. I've heard that wooden airstones are quieter and make finer bubbles. Also, I like the airstone in use because without it, bubbles that don't pop right away form at the top of the tank, and my Marineland Hex Corner filter is working fine.