SpaGuard Spa Calcium Hardness Increaser (12 oz) (3 Pack)

Boosts Calcium Hardness: SpaGuard's Calcium Hardness Increaser enables spa owners to increase their calcium hardness with this easy to use granular formula, which will boost your calcium hardness to above the danger zone, where low levels cause extensive corrosion of plumbing, jets, fixtures, and tub surfaces.Keeps Optimal Calcium Level: It helps raise the calcium level steadily to the optimal calcium hardness level of 200-400 ppm, to keep the spa water from becoming corrosive to heating elements and other equipment.Protects Spa & Equipment for Longer Life: This helps protect your hot tub against corrosion, extending the life of your equipment and hot tub surfaces.Compatibility: Calcium Hardness Increaser is compatible with chlorine, bromine, ozone and biguanide sanitizers.Tested and Proven Effective: SpaGuard products are known for delivering reliable results and making spa care less complex. SpaGuard carries an extensive line of spa solutions that match your unique needs.