I think you said the whisper was a 60. It wasn't rated for your size tank. Try to use products in their target specs. I know real specs. are hard to find. The brands all get sold, and the all change parts suppliers, so what was a good brand last year could suck tomorrow. I have a little dolphin air pump that works fine. I can't say if it will extrapolate to their big ones, but at that price, I am tempted to order the one Red recommends myself and replace several little air pumps.
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