Spa Hardness Up outer filter hand crank for easy use

hand crank for easy use

reduces sanitizer decay rates

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Fresh Mineral water with SmartChlor® Technology for SWIM SPAS up to 3

Spa Hardness Up outer filter hand crank for easy useMaster Clear Spa Hardness Up Increases Water Hardness To Help Prevent Corrosion and Staining. Master Clear Spa Hardness Up 32 oz Liquid Hardness Increaser Raises the Calcium Hardness level in your spa water. The ideal total hardness level in your spa or pool should be between 200 & 400 ppm. Spa Hardness Up is pre dissolved as a liquid for easier dispersal in your spa & quicker absorption. Water hardness will also decrease brittle plumbing & jets,