Don't waste time waiting for effectiveness with other bromine tabs for spas and hot tubs. Leisure Time Sodium Bromide is an effective must-have spa and hot tub maintenance product. The entire Leisure Time brand is known as one of customers’ favorites for the ease of use these products provide. This sodium bromide will establish a bromide reserve in your spa in just a few simple steps, but it is not a disinfectant. The impact is immediate, and it’s designed specifically for use with brominating tablets.