- Tetra Whisper Bio Bag Cartridge for 4, 5 - X-Large Single Pack
- - Replacement carbon filter: Keeps aquarium water crystal clear - removes odors and discoloration.
- - Catches debris: Dense, dual-sided mesh filters debris and fish waste.
- - Fits whisper water filters: Color coded to make it simple to remember which replacement cartridge size to purchase.
- - Convenient: Replacement filter cartridges are fully assembled and ready to use.
- - Usage: Change monthly or sooner if needed.