Crystal clear water Removes phosphates, silicates, odors and color-causing's dissolved organic molecules. The Original Chemi-pure for over 50 years All in one filter media in a bag Longer life - fish often live 3 to 4 times longer Constant pH _ always within a safe range Protects necessary organisms - with no danger of pollution Removes Toxic elements- including copper and phenol Removed organic particulates Good for saltwater & freshwater fishes Crystal clear water at all times