What is hot tub sanitizer? Hot tub sanitizer should be kept at a constant level to help kill harmful bacteria like Pseudomonas, Legionella, and Mycobacterium Avium Complex (MAC). Heat tends to reduce the efficacy of chlorine as a disinfectant, so the most common sanitizer used in hot tubs is bromine. The bromine is available in tablets that dissolve to steadily add a sanitizing agent to the hot tub’s water. Other forms of hot tub sanitizer are also available, including mineral sanitizers, which are often used in combination with bromine.

How do I use hot tub sanitizer? First, follow the manufacturer’s recommended instructions. In most cases, sanitizers are introduced to the hot tub water via a float that slowly releases the sanitizing agents. Sanitizers are meant to be used regularly to maintain a constant level in the hot tub’s water.