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Correct Calcium Hardness Levels: Ensure your spa water stays balanced and protected from corrosion or scale formation by maintaining ideal calcium hardness levels. Prevent Water Issues: Eliminate problems like foam, staining, and cloudy water associated with incorrect calcium hardness levels for a crystal-clear spa experience. Easy Dosage: Effortlessly adjust your water's hardness with specific dose rates, making it simple to achieve the perfect balance for your spa. Protect Your Spa: Guard your spa equipment from calcification and scale deposits by using Relax Hardness Plus to maintain optimal water conditions. Effective Formula: Formulated to efficiently increase calcium hardness, ensuring your spa water remains stable and safe for a relaxing soak.