The tetra whisper 20-40 internal filter for aquariums is the ultimate in quiet, convenient 3-stage filtration. The air pump (included) provides bubbles that move water through the filter, efficiently filtering and oxygenating your aquarium. The water flows through ultra-Activated carbon, absorbing odors and discoloration, as well as through the dual-sided mesh of the bio-Bag filter. Each unit includes the filter, air pump, 2 feet of airline tubing, and one tetra whisper bio-Bag filter cartridge. INTERNAL FILTER: Mounts on the inside of your aquarium with a clip (included). CATCHES DEBRIS: Dense, dual-sided mesh filters debris and fish waste. AERATES WATER: Air-driven design filters water while oxygenating water. CONVENIENT DESIGN: Uses easy-to-change bio-Bag cartridges filter mounts inside the aquarium, making it possible to place the tank flush against the wall.
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