Nava Calcium Hardness Increaser - 4 lb Bucket - NAV-50-7304

Nava 4 lb Calcium Hardness Increaser, when used properly will raise the current hardness levels of your swimming pool water or spa water when soft water becomes a problem. Calcium hardness increaser will prevent corrosion and other damage to your pool equipment and finishes caused by soft water. If the hardness level of your pool water drops below 150ppm, just add calcium harness increaser. 5 pounds will raise the hardness level in 10,000 gallons approximately 40 ppm.