05-04-2013, 10:52 AM
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I have two Elite air pumps. The smaller I bought back in the 1990's, and it is very quiet. [I haven't been running it continually since then, just so no one things that.] A year or so ago, having set up another tank with a sponge, I decided to get a larger size to more safely handle the three/four tanks, and got another Elite. It works fine, but after a few months it is making a fair amount of noise. In the fish room I really didn't care at first, but then it got to me so I put the smaller Elite back on, and it is silent.
I think Elite are reliable pumps, but obviously not always quiet.