Bromine
 
Bromine is a popular pool and spa sanitizer often used instead of chlorine. Bromine has some distinct differences from chlorine. One advantage is that bromine works better for spas / hot tubs (with hotter water and lower water volume) than chlorine does. On the minus side, bromine is sensitive to sunlight, deteriorating rapidly when exposed to the sun. It can also be more expensive than chlorine. For these reasons, bromine is less popular than chlorine for use in outdoor pools.

There are two forms of bromine, free and combined. Together these two are called total bromine. Both forms of bromine are sanitizers, meaning that they can kill bacteria, algae or other living organisms in the water. Be sure to use a test kit that measures total bromine, since that is the best indicator of the level of sanitizer in your water. The ideal concentration of total bromine in a swimming pool is 3 to 5 ppm. The ideal in a hot tub or spa is 4 to 6 ppm. (In spas the level should be slightly higher level due to the smaller volume and the higher temperature of the water.)

You have to monitor the bromine level continually, almost daily, as it will fluctuate constantly. Environmental conditions (leaves, rain) and usage (how many folks are enjoying the pool or spa) will add contaminants in the water. Those contaminants will decrease the bromine existing in the water. Be sure to test the bromine before entering the water. Even if the system is dormant or not in use, you should test the bromine level at least weekly to prevent any build-up of bacteria or algae.

For more detailed advice on the specific chemical treatment for your pool or spa, contact your dealer.
 

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