Leisure Time B-12 Defender for Spas and Hot Tubs 1 Quart 12 Pack

The defender was uniquely developed to prevent scale formation, aid in the removal of existing scale, and help prevent precipitation of dissolved solids in spas and hot tubs. Use weekly for continued protection from scale Compatible with chlorine, bromine, ozone, and biguanide sanitizers Use this product when the water is cloudy and weekly for continued protection from the scale. For spas up to 800 gallons, use 2 oz. For spas over 800 gallons, use 4 oz. Add recommended dosage directly to the spa. Turn on the filter system and allow it to circulate for 1 hour. 16 oz 12 Pack