Spa Pure Brominating 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 sanitation of your spa. This product will give you the effectiveness of chlorine without the chlorine odor. Spa Pure Bromine Tabs are slow dissolving and disperses evenly Fits in most spa feeders and floaters