Hasa Hi-Temp 84084 4 lbs Spa Brominating Tablets - Hasa Hi-Temp Spa Brominating Tablets are effective as a spa and hot tub sanitizer and disinfectant. They clear cloudy water by killing bacteria and destroying contaminates. Whether being used for new spas or spring openings, regular water maintenance, or as part of the winterization process, Brominating Tablets are the perfect cleaner for any hot tub or spa.