A powerful stain and scale prevention duo, Metal Gon and Defender. Used together, these proprietary formulas can prevent and inhibit stains and scale buildup. Defender protects spa surfaces, heaters and other equipment from calcium buildup, while Metal Gon prevents the iron, copper and other minerals sometimes found in fill water from staining the spa surface.
See individual product labels for detailed application instructions.
The best time to treat for metals is when you first fill the spa or drain and refill the unit.
Chlorine, bromine, ozone and biguanide sanitizers.