WATER CHEMISTRY
​Free Chlorine Range
Ideal Range = 3ppm - 5 ppm
​To increase: Add chlorine.
​To decrease: Add sodium thiosulfate
pH
Ideal Range = 7.2 - 7.8
​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)
​To increase: Add sodium bicarbonate
​To decrease: Column muriatic acid or add sodium bisulfate
Calcium Hardness
Range: 150 ppm - 1000 ppm
​​Ideal Range: 200 - 400 ppm
​To Increase: Add calcium chloride.
​To Decrease: Dilute, dilute....​
Cyanuric Acid/Chlorine Stabilizer
Range: 10 - 30 ppm
​​Ideal: 20 ppm
​To Increase: Add granular cyanuric acid
​To Decrease: Dilute, dilute....​
​Cyanuric Acid/Chlorine Stabilizer
Range: 10 - 30 ppm
Ideal: 20 ppm
​To Increase: Add granular cyanuric acid
​​To Decrease: Dilute, dilute....