Negative Positive
Title: Quiet is a relative term
Review: I purchased the Whisper 100 about three weeks ago to drive both tubes on an undergravel filter in a 30 gal tank. I was replacing a Whisper 40 that wasn't able to drive two tubes. The 100 was noticeably louder than the 40, but still OK in my living room. You could tell it was there, but you could tune it out. Until a couple of days ago. The whisper turned into a rattling hum on the left side. Adjusting the airflow made no difference. I had to disconnect the tube. That did the trick, until today when the right side started going south. So I unplugged it and now have two separate pumps (a whisper 40 and some other tiny one I got at Walmart) running the two tubes. Both of them together are quieter than the 100 was when it first came out of the box.I give it a 2 instead of a 1, because I could probably send it in and get it fixed, but at this price it's just not worth the trouble.
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