Calcium Booster (1qt) raises water hardness levels while preventing foaming and corrosion.It also increases water hardness, and by maintaining proper hardness levels it helps to extend the life of your hot tub. Either use Leisure Time test strips or other brands to determine your hardness levels. Water low in calcium will etch plaster and corrode equipment. Calcium booster is compatible with chlorine, bromine, ozone & biguanide sanitizers.
Note: We recommend having your water tested professionally either every 2 weeks or once a month to ensure all chemical levels are correct. This will help maintain crystal clear water & extend the life of your spa.