Acceptible chemical level guidelines

Control Ideal Min Max Comments pH 7.4 7.2 7.6   Free Chlorine 1.5 to 3ppm 1.0ppm 10ppm   Combined Chlorine     0.5ppm Absolute max 1.0 ppm Total Alkalinity 100ppm 80ppm 150ppm   Calcium hardness 275ppm 75ppm 500ppm   Cyanuric Acid 30ppm   60ppm Not always used Sulphates     300ppm New Pools 200ppm Chlorides     600ppm   The measurement of chemical levels and evaluation of Pool and Spa waters is often referred to as the Water Balance. e.g. :- If the pH level is out of range then the effectiveness of the Chlorine will be compromised. Click here for detailed description of Water Balance