Put the gentle cleaning power of minerals to work for you, reducing hassle as well as chlorine usage. POOL FROG is preferable by many to most pool chlorinators not only because of the softer water quality it delivers, but because how it uses pre-filled packs make it so easy to use. Just set the dial to dispense minerals and chlorine at the best level for your water treatment needs; it can help you achieve at least a 0.5 ppm chlorine level. Pool Frog Above Ground System includes the Cycler, Mineral Reservoir and hardware Chlorine Bac Pac and BAM Algaecide sold seperately