I am looking for products that are safe for my health and environment. I purchased a hot tub...without doing homework first. I recently checked out the MSDS (Material Safety Data Sheets) for the chemicals used. I sit in chemical soup. The chemicals used can cause lung cancer, etc.... I have fibromyalgia and found that I had no pain while sitting in my hot tub. No longer...I am too uncomfortable thinking that I am sitting in chemical soup. Can anyone help me find safe products?