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Tetra Whisper® Bio-Bags Filter Cartridge
Whisper® Bio-Bag® Cartridges complete the Whisper® Power Filter package for a clean, easy-to-maintain aquarium. Filled with Ultra-Activated® carbon, the ready-to-use disposable single packs remove waste particles, odors and discoloration, and are easily changed once a month. The Whisper® Bio-Bag® multi-packs come unassembled and offer economical pricing on larger quantities.
It is recommended that you replace your Whisper® Bio-Bag® when water begins to overflow excessively from the Wonder Tube® chamber.