Coral Sea Complete salt mix is a premium grade marine salt blend that formula contains AmQuel water purifier and all the vital ingredients to duplicate natural ocean water. Use with purified water or with ordinary tap water to produce safe marine water for saltwater aquariums you can count on. The AmQuel included in this advanced formula conditions the freshly mixed saltwater before it is introduced into the aquarium. AmQuel neutralizes and detoxifies chlorine, chloramine and residual ammonia commonly found in municipal tap water supplies. With AmQuel in the mix, you know the water will be safe.