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You need to understand how the cellspa works. You think that the material in the water after the use of the cellspa means toxins. It is actually a mixing of the oxidation of the water and the toxins. While the array increases the oxidation of the water, at the same time, is where the electromagnetic circuit (body to water) closes.
You will need a microscope to find out the difference on the water contents after you use the cellspa, with your feet in the water, and without your feet on the water.
If you would check the water contents under the microscope when your feet were not placed in the water, you will find just water and water oxidation, no toxins at all.
If you would check the water contents under the microscope when your feet were placed in the water, you will find the same results, plus different kind of toxins derivated from your body cleanse, depending on your body physical condition.