Brominating Tablets By Leisure Time Leisure Time Brominating Tablets provide a concentrated source of active bromine that is ideal for hot tub sanitizing. These tablets dissolve slowly and evenly and fit in most spa feeders and floaters to provide continuous disinfection of your spa. Features: Based on Dantabrom chemistry Contain 10-percent more active sanitizer than BCDMH Brominating Tablets are 2-1/2 times more soluble than BCDMH. Creates faster bromine residual for spa startup