By the end of your foot detox session, the water in the tub will change color. This color change is primarily caused by the oxidation of the metal plates in the array and the ions reacting with solutes (particles, salts, or other elements) in the water, not solely from your body’s detoxification process.  Some people do actually detox through their feet, but most of the detoxification happens after the foot bath is completed. Without performing tests on the water, we cannot confidently assign water color to indicate that you are detoxing a particular toxin or from a particular organ.