Master Clear Scale Defense (16 oz.) pH UP Use daily or as a

Use daily or as a weekly shock treatment

Diameter: 2 1/16 inches

Used regularly

- Filter Cleaning Liquid

Length with Threads: 9 inches

Master Clear Scale Defense (16 oz.) pH UP Use daily or as aMaster Clear Scale Defense 16 oz. Liquid Stain & Scale Protector Master Clear Scale Defense is a liquid stain & scale protector designed to inhibit the build up of calcium & mineral deposits along the waterline of the spa, as well as on the equipment of the spa & in the plumbing. Used regularly, Scale Defense will help to keep your water looking great as it helps to prevent calcium & mineral build up along your waterline, as well as in the spa itself.