Blue Shield: Calcium Increase 4LB

Calcium Increase raises calcium hardness to prevent staining and corrosion. Low hardness levels can result in corrosion of pool surfaces and fixtures. When water hardness levels drop below 150 ppm, you need to add Calcium Plus. Calcium Increase will instantly raise calcium hardness in your pool water.

• Do not allow calcium hardness levels to fall below 200 ppm 
• Maintain a range of 175-225 for vinyl, fiberglass & non-masonry pools. (225-300 ppm for plaster pools)
• As a general rule, use 6 lbs. of Calcium Plus per 10,000 gallons of pool water. This will boost calcium hardness levels by approximately 50 ppm. 
• Add Calcium Increase directly to the pool by scattering it over a large area, allowing the filtration system to spread it throughout the pool.