Chemi-Pure Blue All-in-one filter media for Reef & Marine Aquariums Superior filtration for Reef, Marine, Jellyfish, & High pH Freshwater Aquariums Now featuring QuickWash Carbon™, a special 0.8mm extruded pelletized activated carbon that has 30% more surface area than our original carbon New carbon’s structure is harder, cleaner and reduces the potential of HLLE developing in your fish due to fine carbon dust particles Contains two high-grade hybrid ion exchange resins to produce a synergistic formula for the health and well-being of your aquarium inhabitants Excellent product for African cichlids Chemi-pure Blue is a revolutionary filtration media that is designed to adsorb nitrogenous organic molecules, along with phosphates and to some extent even nitrates much faster, more efficiently, and for a longer period of time than other aquarium filtration media available. Directions: Keep Chemi-pure Blue sealed in container until ready for use. Rinse bag under running water for 5 to 10 seconds, place bags into a high flow area of your sump, canister filter, or HOB filter. For best results, water should flow gently through the filter bag and media. Chemi-pure Blue should be changed every 2-4 months depending on bio-load. If more than one Chemi-pure Blue filter bag is used, change one at a time every week until all bags have been replaced.Sizes: 156g - Treats 133L 312g - Treats 284L 1247g - Treats 1360L