Spa Calcium Increaser 2lb.
2lbs. Calcium Hardness Increaser for Hot Tubs.
107 in stock
St. Cyr’s brand calcium increase helps increase the hardness of your hot tub water. This bottle contains 2lbs of calcium chloride chips.
Proper calcium hardness levels can reduce foaming, and extend hot tub component longevity. Low calcium levels over time can lead to premature heater element failure.
Refer to label for dosing instructions.
TIP: Add SLOWLY, no more than 4 oz at one time, even less is better.