Tetra Bio-Bag Large Disposable Filter Cartridges - 12 pk

These convenient, easy-to-use, three-stage filtration cartridges are designed to help keep your aquarium crystal clear. Featuring ultra-activated carbon that works to absorb discoloration, contaminants and odors while the double-sided mesh is dense to trap fish waste and debris. These disposable Bio-Bags are compatible with Tetra Whisper 20i and PF10 Power Filters.