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. The best time to treat for metals is when you first fill the spa or drain and refill the unit.
It is a violation of Federal law to use this product in a manner inconsistent with its labeling.
Defender: for spas up to 800 gallons use 2 oz, for spas over 800 use 4 oz of this product directly to the water. Turn filter system on 1 hour or normal filter cycle. Metal Gon: Use entire pint of Metal Gon when starting or refilling spa with fresh water.