hitman12131976 Resident Calculus Teacher Apr 30, 2007 526 0 0 Covina, CA www.eosclan.com Jun 7, 2007 #21 Yeah, my Whisper 20 is under my tank (about 2 feet below the water line), but I have a check valve on it so that the water won't flow back to the air pump.
Yeah, my Whisper 20 is under my tank (about 2 feet below the water line), but I have a check valve on it so that the water won't flow back to the air pump.
