Aqueon QuietFlow Activated Carbon Filter MediaAqueon QuietFlow Activated Carbon Filter Media removes organic pollutants from water which reduces odor and water discoloration, improving the overall water quality for fish. Safe for use with freshwater or saltwater applications this filter media can be used with various fish tank filters including hang on the back, internal, canister and sump. For use with freshwater or saltwater applications Improves overall water quality for fish Removes organic