The HTH Spa Clear Chlorinating Sanitizer is a convenient and easy-to-use product that ensures your spa or hot tub is always in top condition. This sanitizer is ideal for sanitizing and shock treating spas and hot tubs, and it destroys algae and bacteria quickly and effectively. The HTH Spa Clear Chlorinating Sanitizer also protects water against chlorine loss, creating more comfortable water with no sediment. It is compatible with chlorine-based spas and is a must-have for any spa hot tub owner. For results,THinating San as part of your regularTH Spa care routine With HTH, you're all clear and ready to enjoy a clean and refreshing soak in your spa or hot tub.