Sanitizing water is required to protect swimmers from contact with various waterborne pathogens and organic contaminants. Chlorine is the most common sanitizer and typically the less expensive option. Bromine is an alternative and while a little more expensive, doesn't have the same odor intensity that Chlorine does. In our pool line, we're happy to offer another Chlorine option called Scent-trific. It's a full strength, low odor, longer lasting chlorine tab. Like Bromine, it's a little more expensive but due to its longevity, actually winds up saving you money.