The four month solution to cleaner water, reduced chemical usage and enhanced spa enjoyment!  Compatible with chlorine, bromine and ozone sanitizing systems. 
Spa water treated without the use of a mineral purifier requires a 3-5ppm chlorine or bromine residual. Spa water treated with a mineral purifier requires just a .05-1 ppm of chemical sanitizer. 
Minerals reduce harsh odors.
Minerals reduce eye and skin irritation.