The ion foot bath is used to separate the water into hydrogen and oxygen so that your body can absorb them. Thirty minutes in the foot bath is equivalent to eight hours on the beach and ocean when compared to the number of hydrogens absorbed during the foot bath. Your body needs hydrogen; it is like the money of the body, being used in many of the energy exchanges in the body. Water happens to be a very lucrative source of hydrogen.
When the water changes, it is just a chemical reaction happening from the foot bath and your body. Your body is dumping toxins into the water, but that is nothing compared to the massive amounts of hydrogen being pumped into your system. This provides balancing of pH of your system as well as boosting energy to the system through the ions. You cannot have normal cellular function without ions.