Ultimate Pool Test Strip! Free Chlorine, Bromine, Total Chlorine, Alkalinity, pH, Total Hardness, Cyanuric Acid 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 (Stablilizer) 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 prtoects the strips from moisture and UV light. This product can be purchased with English only text or trilingual (English, Spanish, French) instructions.