Spa Defender & Metal Gon Twin Pack is a powerful stain and scale prevention duo. When used together, theseformulas can prevent and inhibit stain & scale buildup. Defender protects hot tub 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 your hot tub surface. Its simple to apply and is conveniently packaged. See individual product labels for more detailed application instructions. The best time to treat for metals is when you first fill the spa or drain and refill the unit. They are both compatible with chlorine, bromine, ozone and biguanide sanitizers.
Note: We recommend having your water tested professionally either every 2 weeks or once a month to ensure all chemical levels are correct. This will help maintain crystal clear water & extend the life of your spa.