Tetra Bio- Bag Small Filter Cartridge 2 pack

These filter cartridges remove odors and impurities from the water for a pure aquatic environment. The easy to assemble Bio-Bags® make aquarium maintenance easy.The highly absorbent carbon removes odors and discoloration, while dense mesh catches debris to provide clean, clear water for your aquatic pet. With the easy-to-use, maintaining a pure aquatic environment is a cinch.