TESPERT 7-in-1 Water Test Strips for Pools, Spas, Hot Springs, Bathtubs & Aquariums Chlorine, Bromine, pH, Alkalinity, Cyanuric Acid, GH

---------------------------------------------------------------------- 7-item pool test strip: 1. Free chlorine, total chlorine, bromine, pH, total alkalinity, cyanuric acid, general hardness. Test strip for pool water, tap water, hot spring water, well water. Test reagent. These types of kits can be not only for simple household water quality testing, but also in school educational projects, laboratories, or by environmental professionals in various contexts.