$49.80 (as of 10/06/2020 04:12 PDT details )
Features:
- The calcium hardness level should be 150 , 250 ppm
- One pound of GLB Calcium Hardness Up will increase the calcium hardness 10 ppm in 10,000 gallons of water
- Compatible with chlorine, bromine, mineral purification systems, salt water chlorine and ozone sanitizing systems