Get the absolute most out of your spa sanctuary with Sirona™ Calcium Booster. The unique liquid product goes into solution immediately to raise the level of water hardness, which helps prevent foaming and corrosion of equipment.

– Spa water hardness level should be between 150 and 400 ppm

– Compatible with chlorine, bromine, ozone and biguanide sanitizers

Available Size: 32 fl. oz.