SpaWise Water Hardener 750gm

Spa Water Hardener

Increases calcium hardness levels in spas Calcium Chloride  
Ideal Calcium Hardness level is between 200 - 300 ppm
Application: 10 g increases Calcium Hardness by 10 ppm per 1,000 litres Dosage rates indicated are only a guide Product should be pre-dissolved in a bucket of water.

View the PDF for more info:
https://www.mypoolclean.nz/site_files/35407/upload_files/SDS-Water-Hardner-2-1658209164.pdf?dl=1