Hot tub sanitizer is the most important product to maintain you hot tub's water. You can add spa sanitizer in at any time! You may be wondering what makes hot tub sanitizers so important? Well, spa sanitizers help to eliminate germs and bacteria in the spa water that cause odor and contamination. There are several types of hot tub sanitizer you can use to ensure your spa water is always sparkling clean. We carry the top brands including Leisure Time, Rendezvous, Brilliance, Baqua Spa, and Spa Frog. Hot Tub Things carries all kinds of spa sanitizers so you can pick out the perfect one for your spa.