calcium plus for pools

A calcium hardness increaser raises the pool’s calcium hardness to help maintain proper water balance. This prevents corrosion of plumbing and equipment, reduces surface etching and staining, and helps avoid cloudy water—protecting heaters, liners, plaster and other pool surfaces.

Typical bag sizes shown include 50 lb, 25 lb, 15 lb, and 5 lb options—choose the size that best matches your pool volume and storage needs.

Always follow the product label. Common methods described include premixing the product in a bucket of water before adding it to the pool, or measuring and adding the product directly to the pool or spa if the label permits. Refer to the dosage guide for amounts and add slowly to circulate and avoid concentrated spots.

Low calcium hardness can make pool water corrosive, leading to deterioration of pool surfaces, plumbing and heaters, surface etching, staining, and cloudy water. Address low hardness promptly to protect equipment and finishes.

Packaging features noted include durable, resealable bags and manageable bag sizes that make the product easier to store and reuse from season to season.

By raising and stabilizing calcium hardness, these increasers help improve overall water clarity and swimmer comfort. Proper hardness reduces cloudy water and protects surfaces, helping pools and spas stay cleaner, smoother, and more inviting for swimmers.