Keep your calcium hardness at proper levels at all times to help protect your pool, water, and pool equipment with Leslie's Hardness Plus, 8 lbs. Product packaging may vary, with no change to product composition or weight.
- Calcium hardness increaser
- Keeps your pool and equipment free from damage
- Increases Calcium Hardness by 10 ppm per 1-1/4 lbs. in 10,000 gallons of water.