Tetra Bio-Bag Cartridges Stay Clean are ultra-activated carbon cartridges for Bio-Bag filters (unassembled). Includes Tetra StayClean technology to keep aquarium glass up to 35% cleaner automatically. StayClean also provides a water clarifier and pH stabilizer.
Compatible with Medium Tetra Whisper Internal, External, and Power Filters. Safe for freshwater or marine aquariums.
Size: Large, 1 count