The Planted Tank Forum - View Single Post - Canister filter or just a penguin biowheel for a 20 gal long
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Old 11-13-2003, 02:51 PM   #6
GulfCoastAquarian
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The Power Filters will also encourage gaseous exchange where the water returns to the tank, but not nearly as much as the BioWheel since its design specificall carries the water over a "ferris wheel" to encourage maximum surface contact with the atmosphere. All this will do is release the CO2 gases you're working so hard to put in.

The main thing I dont like about the AquaClear is that the return lip is so small that it doesn't even reach into the water and causes a very small waterfall. The Whisper reaches into the water and helps it slip in a lot more unoticed.
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