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: U2
Provides effective chemical filtration
Custom fit for the Fluval U2 Filter
Traps fine debris, improves water clarity and removes impurities
Easy to replace
