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Bottle of 50 tests Brand: ITS Europe The high quality PoolCheck® brand is designed specifically with the pool and spa owner in mind. These strips are easy to use, fast in procedure and accurate in results. There is a precise colour chart on the back of the bottle to check and understand your results. This 3 in 1 simple, colour test strip is a compact pool water check test and allows you to test for the following parameters in your water: Total Alkalinity, Free Chlorine and pH, with the added bonus of Free Bromine testing too using the Free Chlorine pad. This allows you to test your water for simple maintenance. Detects: Total Alkalinity: 0, 40, 80, 120, 180, 240, 360 ppm (mg/L) Free Chlorine: 0, 0.5, 1, 3, 5, 10, 20 ppm (mg/L) pH: 6.0, 6.4, 6.8, 7.2, 7.6, 8.2, 9.0 pH