Chemical Adjustment Calculator

Chemical Treatments
Increase Chlorine Calcium Hypochlorite (67%)
Sodium Hypochlorite (12%)
Dichlor (56%)
Increase Total Alkalinity Sodium Bicarbonate
Decrease Total Alkalinity Muriatic Acid
Sodium Bisulfate
Increase Calcium Hardness Calcium Chloride (77%)
Increase Stabilizer Cyanuric Acid
Neutralize Chlorine Sodium Thiosulfate
Water Chemistry Guidelines
Parameter Min Ideal Max Pool Type
Free Chlorine 1.0 2.0 - 4.0 5.0 Pools, Waterparks
Combined Chlorine 0 0 0.2 Pools, Waterparks
  0 0 0.5 Spas
Total Bromine 2.0 4.0 - 6.0 10.0 All Types
pH 7.2 7.4 - 7.6 7.8 All Types
Total Alkalinity 60 80 - 100*
100 - 120**
180 All Types
Calcium Hardness 150 200 - 400 1,000 All Types
Total Dissolved Solids NA NA 1,500 All Types

You can use the form below to determine how much of the desired chemical to add to your pool to obtain the appropriate change.

Size of pool (in gallons):

Chemical to add:
Calcium Hypochlorite
Sodium Hypochlorite
Sodium Bicarbonate
Sodium Carbonate
Muriatic Acid
Sodium Bisulfate
Calcium Chloride
Cyanuric Acid
Sodium Thiosulfate
Sodium Sulfite

Change (in ppm):

Amount to add:

ALWAYS READ MANUFACTURER'S LABEL AND DIRECTIONS PRIOR TO ADDING ANY CHEMICAL. The information being provided is that which is industry standard, based on the most commonly accepted chemical parameters, but do not supersede manufacturer's instructions. Always consult product labels for specific directions as to chemical adjustments.