The chemical bromine is very similar to pool chlorine in the way that bromine kills bacteria and harmful contaminants, but the two pool chemicals react in different ways. Bromine is most commonly used to sanitize spas/hot tubs because it is more stable than chlorine in the warmer spa water temperatures, and because of the lack of chemical odor in the water. The chemical bromine is preferred by many pool and spa owners because it
causes less irritation of the skin and eyes. Because Bromine is so stable, it can be harder to wash the chemical smell from your skin after bathing in a pool or spa that uses bromine. Bromine is available in tablet form and can be added to pool water using a chemical feeder to dissolve the tablets.