Fluval Edge Carbon Clean & Clear Sachet. 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.