GLB Calcium Hardness Up (Bag) | 71243 | 8 lb Calcium Hardness Increaser for Pools

GLB Calcium Hardness Up (Bag) | 71243 | 8 lb Calcium Hardness Increaser for Pools GLB Calcium Hardness Up is an 8 lb calcium hardness increaser designed to raise calcium hardness levels in swimming pools, preventing foam formation, corrosion, and etching that can occur due to low calcium hardness. Maintaining proper calcium levels ensures your pool water remains balanced and protects surfaces and equipment from damage, improving overall pool longevity and swimmer comfort. This easy-to-use, fast-dissolving formula is ideal for use in chlorine, bromine, and saltwater pools, making it a versatile option for pool maintenance. Regular use of GLB Calcium Hardness Up helps stabilize water chemistry, allowing you to enjoy clean, clear, and safe swimming conditions. Features: Raises Calcium Hardness Levels – Prevents foam formation, corrosion, and etching in pool water. Protects Pool Surfaces & Equipment – Safeguards pool walls, equipment, and plumbing from damage caused by low calcium.