Spa Pure Hardness Increaser 16oz
1# raises calcium hardness
Spa Pure Hardness Increaser 16oz DRY chemicals.
Contains Calcium Chloride. This product is used to raise calcium hardness in spas. It is usually only needed once per re-fill as hardness is a pretty stable level.
Having low calcium hardness in your spa can cause erosion of plastics and metals in your spa. Low calcium is one of the main causes of jets popping out.