Spa Choice 1" Brominating Tablets are a powerful and effective sanitizer like chlorine, but is much less irritating to your skin and eyes. Customers like bromine because it produces no chlorine odor and makes your pool or spa water silky smooth! Unlike chlorine, bromine's unique feature is that the "dead" or "used" bromine cells, can be re-used as long as new bromine is being introduced into the water. Bromine also dissolves at a much slower rate than chlorine. Bromine is "pre-stabilized", so it does not require added stabilizers or pool water conditioners, saving you money and enhancing your pool enjoyment. Apply using a floating dispenser or bromine feeder. For use in pools, hot tubs and spas. Effective at higher temperatures. Outperforms chlorine sanitizers when pH fluctuates. 98% Bromochloro-5, 5-dimethylhydantoin. 3.5 Pound Container.