 About ITS Pool Check® is the pool and spa division of Industrial Test Systems, Inc., (ITS). ITS, established in 1989, is a leading manufacturer of instruments and chemistries designed to test water quality parameters. ITS services industries such as municipal water treatment, food beverage, trucking & automotive, pond & aquarium, pool & spa, educational, and medical diagnostics. ITS developed over 70 tests and proprietary chemistries many covered by our U.S. Patents and ETV/USEPA performance verified tests. ITS developed the first and only EPA approved test strip.
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