If you’d rather spend your free time IN the pool than maintaining it, this system is for you. POOL FROG uses sanitizing minerals in conjunction with a very low level of chlorine to kill bacteria two ways. The result is Fresh Mineral Water^®. It feels softer, looks clearer and takes far less time and effort to maintain. The bonus? It uses up to half the chlorine of standard water treatment systems—making it easier on skin, swimsuits and noses.