LaMotte FAS-DPD Commercial 7 Liquid Pool Spa Chemical Water Testing Kit | 7022 Digital photometer pool and spa water testing kit Designed for public pool operators and commercial service professionals. Tests for free chlorine, total chlorine, bromine, pH, total alkalinity, calcium hardness, cyanuric acid, acid demand, and base demand Compare color results against color bar chart using the Octa-Slide 2 Comparator Carrying case and Pool Manager Water Quality Handbook included