Tetra Whisper Bio-Bag Cartridge with Stay Clean Technology, Medium Size

The Tetra Bio-Bag Filter Cartridges – Medium are designed to deliver reliable mechanical and chemical filtration for clearer, healthier aquarium water. Each unassembled cartridge includes high-quality filter floss to trap debris and activated carbon to reduce odors, discoloration, and impurities. Compatible with Tetra Bio-Bag filter systems that use Medium (M) cartridges, these easy-to-install replacements are ideal for maintaining freshwater aquariums and supporting a clean, healthy environment for fish.