Why does the water change color without feet in the water?
If you operate the foot bath without your feet in the water, it will turn the water different colors, yellow to orange to brown because the element usage, minerals, and other impurities in the tap water will precipitate out. However; you can see the difference between this and a footbath session. Please note that if the tap water is particularly impure, the difference in water color between feet and no feet will be less noticeable, just like adding a handful of dirt to already dirty water. The fact that the water changes color is evidence that the array is working properly.
