SpaGuard Calcium Hardness Increaser, 12 oz – Raises Spa Calcium Hardness & Protects Equipment

Overview

SpaGuard Calcium Hardness Increaser is a straightforward, granular formula designed to raise the calcium hardness in your spa water. By nudging hardness toward a safer range, it helps reduce the risk of corrosion on plumbing, jets, fixtures, and tub surfaces. The result is water that remains balanced and equipment that feels protected over time. The target range of 200–400 ppm serves as a practical guideline to help spa owners keep water chemistry steady without overcorrecting.

Expect a simple, no-fuss experience: a granular product that mixes readily with spa water and works with standard sanitizers to support reliable maintenance routines. When hardness is properly managed, you may notice less risk of rough surfaces and a clearer spa experience overall. SpaGuard stands behind its products with a history of spa-care solutions designed for real-world use, and this hardness increaser is part of that broader family of trusted solutions.

Key benefits

• Raises calcium hardness to help keep spa water within the optimal 200–400 ppm range.
• Helps prevent corrosion and equipment wear caused by low calcium levels.
• Supports a steady rise in hardness, aiming to reduce etching and surface damage.
• Simple dosing: 1 tablespoon per 100 gallons increases hardness by about 25 ppm.
• Compatible with chlorine, bromine, ozone, and biguanide sanitizers for versatile use.
• Granular and easy to apply, designed to fit into common spa care routines.

How to use

• Test your spa water to establish current hardness before adjustment.
• With circulating water, add the recommended dose (1 tablespoon per 100 gallons) to raise hardness by ~25 ppm.
• Re-test after dosing and adjust as needed to approach the 200–400 ppm target.
• Maintain regular testing to keep water balanced and protect equipment over time.

Why choose SpaGuard

Choosing SpaGuard means joining a network of experts focused on practical water care. This calcium hardness increaser is designed to work with your spa’s existing sanitizers and systems, helping you pursue a smoother, more enjoyable spa experience without dramatic shifts in chemistry. It’s one tool in a broader line of spa solutions backed by a legacy of service and ongoing innovation.