This specially formulated mix of bromide salts becomes a powerful bromine sanitizer when combined with Leisure Time Renew. Not only is this two-part system completely chlorine-free, but there are no unpleasant side effects typically associated with other non-chlorine sanitizing systems. Reserve is 100-percent bromine sanitizer in an easy-to-use liquid form, for fast dissolving immediate results. Treat the spa with Metal Gon according to its label directions. Add Reserve (4-ounce/250 gallons of spa water) directly into the spa while circulating the water to assure rapid and thorough distribution. Add Renew to activate the bromide bank for a bromine residual.