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Whisper® Bio-Bag® Cartridges complete the Whisper® Power Filter package for a clean, easy-to-maintain aquarium. The Whisper® Bio-Bag® multi-packs come unassembled and offer economical pricing on larger quantities.Fits:XL-Whisper 4 and 5, TetraTec 300 and 500
1. Rinse Bio-Bag• under cool tap water to remove carbon dust. 2. Open lid and insert Bio-Bag into filter. 3. Replace clogged Bio-Bag when there is reduced water flow out of the filter. For best results, change Bio-Bag monthly or sooner, if required.
