Introducing a breakthrough in sanitizing that comes ready to use on select hot tub brands. @ease with the innovative SmartChlor™ Technology and Fresh Mineral Water® benefits offers a complete sanitizing system that’s time released to meet the demands of any hot tub up to 600 gallons. The result is crystal clear water for weeks at a time using up to 75% less chlorine*! So your hot tub is always ready to use.