Increase water hardness to prevent equipment corrosion and scaling.
Available in two sizes, 6 lbs and 25 lbs
Product Dosage & Directions
One pound of GLB® Calcium Hardness Up will increase the calcium hardness approximately 10 ppm for each 10,000 gallons of water. Add directly to circulating pool water. Wait at least 8 hours for the material to distribute before rechecking the calcium hardness level.