SeaKlear Stain and Scale Control for Spas, 1 Quart Bottle Removes and prevents stain and scale in spas and hot tubs Helps prevent chalky buildup on spa surfaces and equipment Made in the United States Stain and scale control helps prevent stain and scale buildup on spa and hot tub surfaces and equipment A must for areas with hard water Removes and prevents stain and scale in spas and hot tubs Helps prevent chalky buidup on spa surfaces and equipment Available in 1-quart