Regular use of Defender will prevent mineral buildup from occurring and causing the spa's heater or equipment to fail. Also aids in the removal of existing scale. The perfect follow up to Leisure Time Metal Gon, applied at start-up.Compatible with all hot tub sanitizing chemicals and spa sanitizing chemicals. Weekly Instructions: Add directly to spa. Use 2-ounce for spas up to 800 gallons. Use 4-ounce for spas over 800 gallons. Run filtration system for one hour, or normal filter cycle.
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