| Ideal Water Chemistry Free Chlorine Range Ideal Range = 2 ppm - 5 ppm To increase: Add chlorine. To decrease: Add sodium thiosulfate pH Ideal Range = 7.4 - 7.6 To increase: Add soda ash To decrease: Add muriatic acid, sodium bisulfate or CO2 Alkalinity Range = 60 ppm - 150 ppm Ideal Range = 80 - 120 ppm (cal. hypo or sodium hypo ideal is 80 ppm - 100 ppm) *Ideal ranges vary for Total Alkalinity levels based upon the type of chlorine being used in the pool or spa. 50 ppm - 80 ppm Pools/Spas using Cal-hypo 70 ppm - 100 ppm Pools/Spas using liquid chlorine 80 ppm - 140 ppm Pools/Spas using gas chlorine To increase: Add sodium bicarbonate To decrease: Column muriatic acid or add sodium bisulfate Calcium Hardness Range = 300 ppm - 1000 ppm Ideal Range = 400 ppm + To increase: Add calcium chloride. To decrease: Dilute, dilute, dilute... Cyanuric Acid/Chlorine Stabilizer Range: 10 - 30 ppm Ideal: 20 ppm To Increase: Add granular cyanuric acid |