Leisure Time Spa 56 Chlorinating Granules 2lb Item # LT562 Description: This concentrated granular chlorine effectively sanitizes and disinfects hot water. Specifically formulated for spas, Features: EPA approved Maintains clean, clear, sanitized water How to use this product: Add 1/2 oz. of this product per 500 gallons of water prior to entering spa. Wait 5 minutes then check chlorine residual. Residual chlorine must read between 2 and 3 ppm. If it does not, additional dosages of material should be added until it does. Once the chlorine residual is established in the 2 to 3 ppm range, the spa or hot tub may be entered. Benefits of this product: Provides a reliable and easy-to-use source of concentrated chlorine. 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.