Leisure Time Defender QT Item # LTDEQ Description: Especially designed to prevent scale formation in spas and hot tubs. Specially formulated for Spas/Hot Tubs Features: Aids in the removal of exisiting scale Prevents scale formation Prevents dissolved solids from separting into spa and hot tub water How to use this product: 1. Add directly to spa. Use 2 oz. for spas up to 800 gallons. Use 4 oz. for spas over 800 gallons.2. Run filtration system for one hour, or normal filter cycle Benefits of this product: Control of calcium can be very challenging, especially in spas. Regular use of Defender will prevent mineral buildup from occurring and causing the spa’s heater or equipment to fail. About Leisure Time Spa Products: For more than 25 years, Leisure Time™ has been the premier name in spa water care. You can depend on the quality of these spa care products for the up keep and water maintenance of your spa.