Tetra Bio-Bag Cartridge Extra Small 4 Count

Help keep your aquarium crystal clear with Tetra’s Whisper Aquarium Filter Cartridges. These disposable filter cartridges are easy to use and work to help keep your fish tank in tip-top condition. The ultra-activated carbon is designed to remove discoloration, contaminants and foul odors while the dense, double-sided mesh works to trap debris and fish waste.