The Insta-TEST® 6 Plus pool & spa strip measures Free Chlorine 0-10 ppm, Bromine 0-20 ppm, Total Chlorine 0-10 ppm, Total Alkalinity 0-240 ppm, pH 6.2-9.0, Total Hardness 0-800 ppm, and Cyanuric Acid (Stabilizer) 0-250. This test strip is a dip-n-read strip with instant results. Each bottle includes 50 test strips packaged in a waterproof PopTop bottle with hinged cap. The Insta-TEST® 6 Plus is the ultimate pool strip allowing the user to measure all 6 tests to help maintain perfect water balance. The bottle has a molded desiccant liner, which protects the strips from moisture and UV light. Test Factor Range Free Chlorine 0, 0.5, 1, 3, 5, 10 ppm Total Chlorine 0, 0.5, 1, 3, 5, 10 ppm Bromine 0, 1, 2, 6, 10, 20 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 Cyanuric Acid 0, 40, 100, 150, 250 ppm
