Sirona™ Calcium Booster 1 lb. - Granular Calcium Hardness Increaser for Hot Tubs Gift Pack The Tylö Sauna Ergonomic Backrest

The Tylö Sauna Ergonomic Backrest provides comfortable back support when sitting in the sauna

The Tear-Aid® Vinyl Repair Patch for Hot Tub and Spa Covers provides a simple and easy method of patching holes and tears in hot tub covers

Height: 10 3/4"

Top & Bottom: Flat with center hole opening

This filter also works on the Caldera Highland Series Aventine

Sirona™ Calcium Booster 1 lb. - Granular Calcium Hardness Increaser for Hot Tubs Gift Pack The Tylö Sauna Ergonomic BackrestSirona 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