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The chemical “Bromine” is very similar to chlorine in the way that it kills bacteria and harmful contaminants, but the two chemicals react in different ways in the swimming pool water. Bromine is most commonly used to sanitize spas/hot tubs because it is more stable than chlorine in the warmer temperatures.

Although bromine is generally easier on the skin and eyes than chlorine, there is still the potential for an adverse reaction. This reaction can include itchy, red eyes and irritation of the respiratory system. The amount used to keep pools and spas free of microorganisms and bacteria is low enough that most people are not bothered.