With aneasy-to-read color chart, youcan identifyup to6parameters (Total Chlorine, Chlorine, Bromine, pH, Total Alkalinity, Cyanuric Acid, Total Hardness)of test solutionswithin 1minute.Lets takepH as a reference tokeep the water fresh and sparkling clean! Whats the importance of pH value? pH is a measurement of your bodys electrical balance and helps regulate bodily functions. High pH value make it difficult for enzymes to function properly, which can lead to illness. Acidic body can lead todecreased immune system, poor sleep cyclesetc. Therefore monitoring pH value of water iskey element of keeping health. Total Chlorine Test Range 010ppm Chlorine Test Range 010ppm PH Test Rangeup to 8.4 Total Alkalinity Test Range: 0240ppm Total Hardness Test Range: 01000ppm Cyanuric Acid Test Range:0240ppm FEATURES: DIRECTIONS: