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
Fluval Poly/Carbon Cartridges features two sides for effective chemical filtration, the crucial second stage in the filtration process. The polyester filter pad side filters out fine debris and contaminants. The Carbon side filters out harmful liquid substances, colorants and odors. For freshwater, marine or reptile environments. For U series filter model: U4