In The Swim Calcium Hardness Increaser For Swimming Pools - Fast-Acting, Scale Prevention - 94% Calcium Chloride - 45 Pounds Y7220

Boost Water Quality: Prevent cloudy, dull water by restoring the right calcium levels in your pool Protect Your Pool: Helps stop costly damage like corrosion and pitting on pool surfaces and equipment Easy-to-Use Granules: Fast-dissolving formula works quickly—just measure, pour, and circulate Dial in the Perfect Balance: Raise hardness 50 ppm per 6 lbs per 10,000 gallons—easy, accurate, and powerful Multi-Use Chemical: Highly effective for swimming pools—and also serves as an