Cal Rise

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SpaBoss Cal Rise is the effective way to increase the Calcium Hardness of your spa or hot tub's water The ideal range of hardness is between 150-275 ppm. Cal rise is granular and s hould be diluted before adding to water. Cal rise is pH neutral. High calcium hardness promotes scale formation and cloudy water, where as low calcium hardness promotes suds/foaming or water and corrosive water. Show more