Prolong the life of your spa with Caribbean Spa Calcium Hardness Increaser for Hot Tubs. Caribbean Spa Calcium Hardness Increaser prevents foaming and equipment corrosion in hot tubs. Maintain a balanced calcium level in spa water to prolong equipment, filter, plumbing, and acrylic life. Weekly testing is recommended to balance all chemicals in the spa water.
For best results use with the Caribbean Spa chemical line. Always follow label directions before using any chemicals in pool or spa water.
