Specifically designed for the Fluval EDGE power filter, Fluval Carbon Clean & Clear Renewal Sachets contain premium grade carbon that provides superior adsorption qualities that eliminate toxic impurities, odours and discoloration from aquarium water. Key Features: *Specifically designed for the Fluval EDGE power filter *Contains premium grade carbon *Provides superior adsorption qualities *Eliminates toxic impurities, odours and discoloration from aquarium water *Each pack contains 3 sachets.