SpaPure Calcium Hardness Increaser 16oz – Safely Raise Spa Water Hardness & Protect Surfaces

Why calcium hardness matters in your spa

Maintaining the right calcium hardness helps balance spa water and supports the integrity of your surfaces and equipment. When hardness is too low, water can become more aggressive, potentially affecting metal parts and the spa shell. By stabilizing hardness levels, you create a steadier environment for heaters, jets, and sanitizers, making routine maintenance feel more predictable and less stressful.

What SpaPure Calcium Hardness Increaser does

• Gently raises calcium hardness in spa water to restore a balanced, consistent environment.
• Supports surface and component longevity by reducing the risk of corrosive conditions.
• Designed to work with all sanitation systems — bromine, chlorine, mineral sanitizers, and biguanide.
• Suitable for use in any spa or hot tub.

How to use

• Test your water and follow label instructions for dosing based on current hardness levels.
• With the pump running, slowly add the product to promote even distribution.
• Re-test after circulation and re-dose as needed until you reach the desired hardness.

Versatility and maintenance

This granular hardness increaser is designed for routine spa care and is compatible with common sanitizers and care routines, helping you maintain a stable water balance with minimal effort.

Real-world benefits you may notice

• Potential reduction in surface roughness or pitting during busy usage periods when hardness is balanced.
• Consistent sanitizer performance and less scale buildup when water balance stays within range.

SpaPure focuses on straightforward, reliable spa care. Always follow label directions and test water regularly to maintain the right balance for your equipment and preferences.