2-Pack Spa Defense - 2 x 32 oz. bottles hot tub defender (64 oz. total)
Spa Defense is a new generation blend of organic polymers designed to prevent calcium scale formation, aid in the removal of existing scale, and to help prevent precipitation of dissolved solids in spas. Regular use of this product will help to prevent problem mineral buildup from occurring, and help avoid heater or equipment failure. Product notes:  Use 2 oz. weekly for spas up to 800 gallons, then run filtration system for one hour, or normal filter cycle. Compatible with chlorine, bromine and biguanides. Guaranteed to equal or outperform Leisure Time Spa Defender.