We have been using this product for 2 years now and it is wonderful. It keeps the tub clear and clean. I can’t use normal chemicals with my skin. Now I can enjoy the tub all the time without worry. I love the fact that is takes such a little bit of time to maintain our tub. Our first tub we had was a nightmare to keep everything in balance. It not only saves time but it is a lot cheaper to use that normal chemicals. You don’t have to worry about the chemicals hurting your body. It’s a winner. Thank you for supplying such a wonderful product.