Spa Boss bromine tablets are a powerful and effective sanitizer like chlorine, but it is much less irritating to your skin and eyes. It produces no chlorine odor and makes your pool or spa water silky smooth! Bromine is a pre-stabilized chemical comprised of 63% bromine and 31% chlorine, so it does not require the use of stabilizers or pool water conditioner which saves you money and enhances your pool enjoyment. For pool & spa owners who prefer not to use a chlorine-based sanitizer, Bromine is a great alternative.