Finally – a complete sanitizer exclusively for swim spas up to 3,000 gallons, FROG @ease. EPA registered with Sanitizing Minerals and a low level of chlorine FROG @ease works with SmartChlor, a unique, patented chlorine that maintains a constant 0.5 -1.0 chlorine level at all times and uses up to 75% less chlorine* SmartChlor regulates itself - it automatically adds chlorine to meet demand, and works with Sanitizing Minerals, condition the water for softness, and help keep pH balanced - no additional chlorine is needed, and swim spa water is ready when you are! With so much less chlorine, there’s no smell, no skin irritation, swimsuits don’t fade, surfaces are protected, and you don’t have to drain and refill constantly Never touch chemicals – prefilled cartridges mean no measuring, no adding granules or powder by hand after every use, no storing open containers - it’s no mess, no guess, and no stress!