Low calcium can cause corrosion of your spa's plumbing and heating, and stain your spa's surface. When the calcium level of your spa water drops below 200 ppm, just add Calcium Hardness Increaser as needed.
Low calcium can cause corrosion of your spa's plumbing and heating, and stain your spa's surface. When the calcium level of your spa water drops below 200 ppm, just add Calcium Hardness Increaser as needed.