KNG Inline Pool Frog IG Package With POOL FROG® your pool water will look and feel better without a lot of work or a lot of chemicals. This system eliminates bacteria and prevents algae growth using a combination of minerals and reduced chlorine levels. The end result is softer water that has an added sparkle. There are three parts to the complete POOL FROG® Mineral Purifier* - the Cycler, Mineral Reservoir and the pre-filled chlorine Bac Pac. The POOL FROG® Cycler acts as the "water treatment center" and controls the flow of water through the system. No extra plumbing. No electricity. No extra headaches! The POOL FROG® Mineral Reservoir, which contains a proprietary blend of minerals and fits inside the Cycler. The minerals continually replenish themselves for added protection against bacteria and algae, as well as keeping your pool's pH balanced by acting as a neutralizer. One Mineral Reservoir will last the full season or up to 6 months; use two reservoirs for year-round pools. The pre-filled chlorine Bac Pac is then inserted into the Mineral Reservoir and adds low level chlorine support for 1-3 weeks, which works along with the minerals to completely eliminate bacteria. The complete POOL FROG® System allows you to cut chlorine use by up to 50% - 80% over standard water treatment programs. The patented Control Dial on the front of the Cycler lets you manage the amount of water flowing through the system. Water is circulated upward into the Mineral Reservoir and chlorine Bac Pac simultaneously. The erosion design of this system continuously dispenses chlorine at a precise low level (only 0.5-1ppm is needed). Once you've determined the correct setting for your pool just set it, then forget it!