Keep your spa or hot tub surfaces protected and your water perfectly balanced with Clear Spa Calcium Increaser. This fast-dissolving formula safely raises calcium hardness levels to prevent corrosion, etching, and equipment damage caused by low calcium.

Formulated specifically for spas and hot tubs, it helps maintain smooth, comfortable water and extends the life of heaters, jets, and plumbing.

✅ Raises calcium hardness safely and effectively
✅ Prevents corrosion and surface damage
✅ Designed for spas and hot tubs
✅ Quick-dissolving and easy to use

Size: 2 lb Bottle

💧 Maintain calcium hardness between 150–250 ppm for optimal spa performance and protection.