The Fluval U4 Underwater Filter Poly/Carbon Cartridge has two unique sides for thorough and effective chemical filtration, which is the crucial second stage in the filtration process. The poly/foam side filters fine debris and contaminants.
The carbon side removes harmful liquid substances, colorants and odors.
Key Features:
- Poly/carbon cartridge for complete and effective chemical filtration
- Polyester side filters debris and contaminants
- Carbon side removes harmful liquid substances, dyes and odours
