Sirona™ Calcium Booster 1 lb. - Granular Calcium Hardness Increaser for Hot Tubs Caldera cold plunge filter It's like SPF for your

It's like SPF for your hot tub cover

concentrated gel formula plumbing line and jet cleanser for hot tubs and swim spas

Prodigy 1995-2007

The Tropic Seas Spas Tonga 35 Sq Ft

This all-in-one cleaning solution can be used on everything from vehicle interiors to RV awnings to car covers (and hot tub covers)

Sirona™ Calcium Booster 1 lb. - Granular Calcium Hardness Increaser for Hot Tubs Caldera cold plunge filter It's like SPF for yourSirona Calcium Booster will effectively raise the level of calcium in spa water. The granular formulation will gradually increase water hardness which will help prevent the corrosion of equipment and foaming caused by soft water. To figure out the dose of calcium hardness increaser for your hot tub gallons, just follow the chart that is on the back of the bottle. Size: 1 lb. Sirona Calcium Booster is compatible with almost all hot tub sanitization