The Pool Frog System Package 5400 Series, uses a Mineral Reservoir and a pre-filled Chlorine Pac, for complete pool care. This allows you to have more fun with your pool and spend as little maintenance time as possible. Pool Frog is the only mineral system with a pre-filled chlorine pac that meets the EPA requirements to lower previously approved safe chlorine levels by up to 50%. With minerals, chlorine use can be cut up to 50%* over standard water treatment programs. This is a very convenient way of reducing chlorine use and hassle. The Pool Frog 5400 Series uses patented mineral technology to destroy bacteria while making your water feel softer and look sparkling clean. Pool Frog will make you a believer in mineral pool care with water that feels incredibly soft so your skin stays silky smooth.