Leisure Time Brom Tabs provide a concentrated source of active bromine that is ideal for hot tub sanitizing. This product creates a faster bromine residual for spa start-up. They dissolve slowly and evenly, and they fit in most spa feeders and floaters to provide continuous disinfection of your spa. These tabs are formulated based on Dantabrom chemistry. Dantabrom chemistry creates a better dissolution rate in a floating feeder. Brom Tabs low-dusting tablet shape fits most floating feeders to give you the effectiveness of chlorine without the chlorine odor.