ecoone® SHELL cleaner is a very powerful, yet gentle cleanser that removes scum and stains from your spa shell, utilizing natural ingredients. It's safe to use while in your tub or pool and will not alter water chemistry or cause foaming. ecoone® Pool & SPA water care products are not only the easiest to use, they are some of the safest water treatment products on the market today. Our easy-to-use products will replace and reduce your need for the vast majority of your water care chemicals and just plain put the fun back into owning a pool or spa!