I've got a 65gal tank with a single air stone in a volcano. The pump I'm currently using is a tetra whisper quiet pump to supply the air. So here are the things I'm running into and am asking for advice on; 1st this pump is quiet but the vibrations elsewhere drive me nuts, like against the cabinet as it vibrates across the shelf, and 2nd I've been noticing some water in the air line just recently. I'm guessing some moisture is pushing past the positive pressure. I'd like to hear about people's experience with good and quiet pumps. Brand etc. Also, I'd like to know what kind of pump people are using for bigger tanks. We have plans of moving in about 1-1.5 year and I plan on graduating from my 65 gal to something like a 180-250gal depending on where we buy a house. Any experiences you guys have would be nice to hear about! Thank you!