Spa Essentials Calcium Hardness Increaser for hot tub water.

• Container Size: 350 grams (0.78 Lbs)

• Product: Spa Essentials Calcium Hardness Increaser

• Calcium Hardness in spa water should be maintained at approximately 150-200 ppm.

• Low calcium hardness (below 150 ppm) may cause corrosion of surfaces and damage components of the filtration and circulation system as well as heaters, jets, headrests and other spa components

  H4931