Simplify spa and hot tub chemicals maintenance by reducing sanitizer demand. 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. Formulated for use with bromine, chlorine, ozone and non-chlorine shock and will fit inside most hot tub filters. 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.
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