Specifically designed for the Fluval U4 filter, the U4 Poly-Carb Cartridge has two unique filtering sides that combine to provide thorough chemical filtration.
U4 Underwater Filter
Features
- Chemical filter media
- Polyester side filters out fine debris and contaminants
- Carbon side filters out harmful liquid substances, colorants and odors
- Suitable for freshwater, saltwater or reptile environments
- Convenient 2-pack format
- 2 x poly/carbon cartridges included