Calcium Chloride (Dry)
- Calcium chloride
- Increases pool and spa water hardness
Hasa's Calcium Chloride (Dry) is used to increase the calcium hardness of pool and spa water. Plaster surfaces may etch if calcium hardness is below 175 ppm.
Test the water with a reliable test kit. Acceptable calcium hardness is within a range of 175-275 ppm.