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

• The calcium increaser for hot tub raises calcium hardness in spa water quickly, so you can focus on whole-self wellness

• Prevents foaming and equipment corrosion for a clean, soothing spa experience