These proprietary formulas work together to prevent and inhibit stain and scale buildup. Defender protects spa surfaces, heaters and other equipment from calcium buildup. Metal Gon prevents the staining of hot tub surfaces from iron, copper and other minerals often found in fill water. 

• Simple to apply
• Conveniently packaged

Tips:
The best time to treat for metals is when you first fill the spa or drain and refill.

Compatible with:
Chlorine, bromine, ozone and biguanide sanitizers.