Hot Tub Things Stain and Scale Control 32 Ounce - Prevents Discoloration and Staining of Spa Surface This necessary fresh fill product prevents the collection of harmful minerals on the hot tub shell and parts! America's #1 Trusted Brand of Hot Tub Chemicals Safety Tested to Assure Quality, Guaranteed Performance Formulated Exclusively for Hot Tubs And Made from the Purest Chemicals Available Compare to Leisure Time Control