For the ultimate in convenience and quiet, choose a Whisper® In-Tank Filter. This filter mounts on the inside of the aquarium, rather than hanging from the outside -- making it possible to place the tank flush against a wall. The 3i In-Tank Filter uses air bubbles to move water up the airlift tube and through the filter cartridge making it ideal for keeping small fish and breeding fish.
The Whisper® In-Tank filter adjusts easily to high or low water levels with mounting suction cups and/or bracket. Each unit includes the filter, air pump, two feet of airline tubing and one Small Whisper® Bio-Bag® filter cartridge.
The air pump is so horrible that it died on me! buy a different air pump with an air regulator valve. Also there is no bio-media and little space to add some, but I managed to put a small piece or a scour pad. other than that it is good. It helped my betta bowl clean(before I moved him),and I have it now in my hospital tank, and it keeps it clean with the replacement air pump(10-30 gallons with an air regulator)
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For the ultimate in convenience and quiet, choose a Whisper® In-Tank Filter. This filter mounts on the inside of the aquarium, rather than hanging from the outside -- making it possible to place the tank flush against a wall. The 3i In-Tank Filter uses air bubbles to move water up the airlift tube and through the filter cartridge making it ideal for keeping small fish and breeding fish.
