LaMotte Insta-Test strips provide the complete picture of a pool or spa's water quality faster than ever before. Insta-Test Strip 5 tests for Free Chlorine, Total Chlorine, Alkalinity, pH, and Total Hardness. Product Overview Brand: LaMotte Ph Range: [7.2, 7.8] Recommended Uses For Product: Spa, Swimming Pool Unit Count: 50 Count Manufacturer: LaMotte Chemical Products Co. Product Features To use: Dip the strip, swirl three times and the results from all five tests are ready instantly The Insta-Test Strip 5 strips are designed for use by pool and spa operators One bottle contains 50 strips Tests for free/total chlorine, bromine, alkalinity, pH and total hardness Specifications Test Factor Range Free Chlorine 0, 0.5, 1, 3, 5, 10 ppm Bromine 0, 1, 2, 6, 10, 20 ppm Total Chlorine 0, 0.5, 1, 3, 5, 10 ppm Alkalinity 0, 40, 80, 120, 180, 240 ppm pH 6.2, 6.8, 7.2, 7.8, 8.4, 9.0 Total Hardness 0, 100, 250, 450, 800 ppm