Tetra 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.
X-LARGE Bio-Bag Filter Cartridges (Formerly Turbo) fit - Whisper 4 & 5 Power Filters.
The Tetra Whisper Bio-Bag multi-packs come unassembled and offer economical pricing on larger quantities. It is recommended that you replace your Tetra Whisper Bio-Bag when water begins to overflow excessively from the Wonder Tube chamber.