HTH® Pool Care Calcium Up 4 lbs.

Raise the calcium hardness of your swimming pool water to protect your pool surfaces and equipment from harm.

Protects pool surfaces
Helps chlorine to work efficiently
Prevents equipment damage
Compatible with all swimming pools

Raises calcium hardness levels
Helps prevent swimming pool water from becoming corrosive.

Protects & prevents corrosion
Protects pool liners, metal and plastic surfaces as well as equipment from damage.

You’re all clear with HTH®
For best results, use HTH® 6-Way Test Strips weekly to test, balance and maintain calcium hardness levels between 200 and 500 ppm.