Calcium Plus Hardness Increaser for Hot Tubs and Spas (14 oz.)
HTS Turbo Calcium Plus is designed to increase water hardness, minimize foaming, and protect metal surfaces against corrosion in hot tubs and spas.
Our calcium hardness increaser is compatible with all HTS Turbo products, as well as various spa sanitizers including chlorine, bromine, biguanide, and ozone.
With just one level capful (equivalent to 2 tbsp.), Calcium Plus increases hardness by approximately 10 ppm in a 500-gallon spa.
Keep your hot tub water balanced and protected with HTS Turbo Calcium Plus, ensuring optimal water conditions and extending the lifespan of metal surfaces.
Available in a 14 oz. bottle, our spa hardness increaser provides an ample supply for maintaining water hardness and offers easy storage.
2.25 x 2.25 x 8 inches
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