Product information "Leisure Time Calcium Booster"
Leisure Time Calcium Booster raises water hardness level while preventing foaming and equipment corrosion. Using this product to maintain proper hardness levels will help extend the life of your spa. Calcium Booster will optimize your total spa experience by keeping the water balanced. This product is compatible with chlorine, bromine, ozone, and biguanide sanitizers.
1 fl oz per 500 gallons raises calcium hardness 7 ppm.
Determine amount of product to be added. The ideal hardness level is 150-400 ppm.