This aquarium filtration media kit is compatible with the Fluval C2 (30 Gal) aquarium. Replace your filter media once every 2-4 months to extend the life of your aquarium. Package includes: 4 Sponge Filters, 4 Tarpaulins, 4 Activated Carbons, 1 Pack Ceramic Ring The Tarpaulins effectively blocks debris for a smoother flow of water. The Sponge filters trap large particles, creating a healthy and clean aquatic environment for your fish. C2 Activated Carbon effectively eliminates odors, discoloration and impurities from aquarium water and improves water clarity. The porous design of the ceramic ring further improves filtration. Customer Service: We prioritize your satisfaction. If you encounter any problems, please contact us right away for prompt assistance. Beaufan 2 Aquarium Filter Media Kits Compatible with Fluval C2 (30 Gal) Aquarium Power Filter, Includes 4 Pack Foam Pads, 4 Pack Tarpaulins, 4 Pack Activated Carbons and 1 Pack Ceramic Ring