The ultimate on-site hand-held pool and spa photometer. It measures eleven pool & spa tests directly on a digital display. Test factors include Free Chlorine, Total Chlorine, Bromine, pH, Alkalinity, Calcium Hardness, Cyanuric Acid, Iron, Copper, Biguanide, and Biguanide Shock. The kit features economical liquid reagents along with easy to use TesTabs tablets, and a pool manager handbook. The ColorQ eliminates the need to visually determine slight color variations or use look-up tables, thus taking the guesswork out of poolside water analysis. The ColorQ PRO 11 and reagents are packaged in a rugged carrying case for on-site testing. The TesTabs Kit uses tablet reagents for all tests except the Biguanide test.