Tetra Whisper Internal Filter for Aquariums 20 to 40 Gallons with Air Pump

The Tetra Whisper 20-40 Internal Filter for aquariums is the ultimate in quiet convenient 3-stage filtration. This submersible 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 and easily hide with tank decor. The air pump (included) provides bubbles that move water thro...