Calcium Hardness Increaser

Calcium Hardness Increaser
Price: $19.99

Pool Calcium Hardness Increaser (granular calcium chloride) raises the water hardness level in swimming pools and spas!

Calcium hardness increaser prevents pool and spa water from becoming corrosive and damaging the pool plumbing, heater and metal components.

Calcium hardness increaser should be added when the pool water hardness level falls below 150 ppm to stop aggressive pool water conditions, pool staining and etching of pool surfaces. Great for use in areas where soft water is a problem.

Recommended dosage: 5 lbs. pool calcium hardness increaser per 10,000 gallons will raise the pool water hardness level approximately 40 ppm.


Please select the size you desire below when ordering. Choose 5-lb. bag, 25-lb. pail, 45-lb. pail, 90 lb. shipped in two 45-lb. pails. 
NOTE: Our pool chemical packaging may vary from the images shown, but the product quality is always as described.