PoolCheck® Low Chlorine 3 in1 (NCW-481338)
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. This test specificlly detects free chlorine at a very low range. This allows you to test your water for simple maintenance.