Simplify spa and hot tub chemicals maintenance by reducing sanitizer demand. This spa mineral purifier from Leisure Time helps control bacteria, prevent algae and improve filter efficiency while drastically reducing the amount of harsh spa chemicals needed to maintain a clean and healthy spa. This spa care product will fit inside most hot tub filters and is formulated for use with bromine, chlorine, ozone, and non-chlorine shock. Lasts up to four months in spas up to 1000 gallons. To install, insert into filter cartridge, in filter well or in skimmer. Lower chlorine or bromine level to only 0.5 ppm. Replace every 4 months or when draining and refilling spa. About the Brand: Leisure Time was developed for use in spas, hot tubs, and jacuzzies. Our water care products are both economical and powerful enough for the toughest jobs. Within Leisure Time’s wide selection of products, we offer everything from algaecides and deposit control formulas to non-chlorine shock treatments, powerful surface cleaners, clarifiers, enzyme-based cleaners, and more. If you like using Leisure Time, check out some of the other similar brands from our parent company, Sigura. With brands like HTH, Applied Biochemists, GLB, Spa Selections, and PooLife, Sigura has a long heritage and more than a century of experience in developing innovative water treatment solutions for use in pools, lakes, ponds, hot tubs, and more. At Sigura, we have an unparalleled passion, pride, and commitment to delivering superior water treatments that improve the environment and enhance the security, health, and safety of the global communities we serve. With our track record of innovation and simple, intuitive solutions that anticipate needs, Sigura customers feel more secure as they enjoy their pools, spas, ponds, and lakes.