One pound of Reserve added to 1,000 gallons of pool water will increase your calcium hardness level by 80 ppm. While the water is circulating, broadcast Reserve across the deepest part of your pool. Available in 5LB, 10LB, 20LB, 50LB.
- Available in 2LB, 5LB, 10LB, 25LB, 50LB.
- Use 1lb per 1,000 gallons of water to increase your calcium hardness level by 80 ppm.