No color matching, no look up charts, no guessing! The unique, multi-test ColorQ PRO 6 pool and spa hand-held photometer reads seven test factors (Free Chlorine, Total Chlorine, Bromine, pH, Alkalinity, Calcium Hardness, and Cyanuric Acid) directly on a digital display. Featuring an innovative dual-optic design the ColorQ provides more accuracy and more test factors. The ColorQ eliminates the need to visually determine slight color variations or use look-up tables, thus taking the guesswork out of pool side water analysis. This kit uses liquid reagents for most tests, but uses tablets for the Calcium Hardness and Cyanuric Acid tests. Calcium hardness testing tablets have a much longer shelf life than LaMotte liquid calcium hardness reagents.