FROG pool and hot tub sanitizers use patented mineral technology with a low level of chlorine to help create clean, clear, softer water. Instead of relying only on traditional liquid or granular chlorine, FROG systems use prefilled replacement cartridges that dispense minerals and sanitizer with less measuring and handling. These systems can support a simpler maintenance routine for pools and hot tubs of different sizes. For best results, regularly check water balance with a reliable water testing kit and use a compatible pool chemical as needed to help maintain clear water.