SpaGuard Spa Calcium Hardness Increaser - 12 Oz
Packaging may vary
SpaGuard's Calcium Hardness Increaser enables spa owners to increase their calcium hardness with this easy to use granular formula. This product will boost your calcium hardness. Low levels cause extensive corrosion of plumbing, jets, fixtures, and tub surfaces. Calcium Hardness Increaser will help raise the calcium level at a steady but not create scale build-up and cloudy water. The optimal calcium hardness level is 200-400 ppm, while anything below 100 ppm will cause corrosion. Raises calcium levels. 1 tbs. per 100 gallons increases calcium hardness-25ppm Prevents corrosion of equipment due to low calcium hardness Prevents etching of plaster due to low calcium hardness.