Leisure Time Sodium Bromide is used to establish a reserve of bromide in the spa water. When initially filling, or refilling a spa, it establishes a bromide reserve, necessary for activating the disinfectant in bromine tablets.
Each 2 oz. packet will establish proper bromide reserves in a 400 gallon spa.
NOTE: This is not a disinfectant agent, and must be used in conjunction with bromine tablets for proper sanitation of spa water.