Fluval Edge Algae Cleaner works to clear phosphate, nitrate and nitrite in your aquarium, helping to make your water crystal clear, The cleaner is suitable for all types of aquarium environments and helps to reduce odors, and provide easier tank maintenance, Fluval Edge Algae Cleaner Features and Benefits:, - Suitable for fresh and marine water aquariums, - Fluval Algae Clear traps phosphate, nitrate and nitrite, - Helps reduce odors, makes maintenance easier and provides crystal clear water to create ideal conditions for fish, SKU: RCHG0419