The Cover Guy Mineral Purifier will make your hot tub water clear and soft and help naturally cut down on the amount of chemicals used in your hot tub. The Cover Guy Mineral Purifier reduces bacterial growth to extend the life of your hot tub components and overall health and clarity of your water. Simply place the stick in your hot tub skimmer/filter area to allow the water to flow through it. The combination of silver, copper and zinc kill bacterial as the water flows through the stick reducing harsh odors, softening the water and eliminating the need for daily maintenance. The Cover Guy Mineral purified lasts up to 4 months and is completely compatible with Ozone Generators, UV Sanitizers and Salt Generators.