GLB Calcium Hardness Up 25lb.

Use Calcium Hardness Up to increase water hardness levels, help prevent equipment and surface corrosion as well as minimize foaming.

– Calcium hardness levels should be maintained at 150-250 ppm.

– One pound increases calcium hardness 10 ppm in 10,000 gallons of water.

– Compatible with chlorine, bromine, mineral purification systems, salt water chlorine and ozone sanitizing systems.