Both chlorine and bromine are commonly used as sanitisers in hot tubs to kill bacteria and other contaminants. The choice between the two often comes down to personal preference, as both have their benefits and drawbacks. Chlorine is a strong and effective sanitiser that is widely available and relatively inexpensive. It is easy to use and can be added directly to the hot tub water in the form of tablets or granules. However, it can have a strong, unpleasant smell and can cause eye and skin irritation in some people. Chemicals for hot tub maintenance Bromine is another effective sanitiser that is often used in hot tubs. It is less harsh than chlorine, has a milder smell, and is less likely to cause eye and skin irritation. However, it is more expensive than chlorine. Ultimately, choosing chlorine and bromine for your hot tub will depend on your preferences and budget. It is essential to regularly test and maintain the proper levels of sanitiser in your hot tub to ensure clean and safe water for all users.