It’s easy to do, and easy to make one. Be sure to well ventilate you’re area of the house because Stainless steel can be used because this material seems to last longer and cleans easier. BUT, concerns have been raised which propose that as the electrode breaks down, the chromium in stainless steel becomes a compound (hexavalent chromium) which ends up in the liquid (or as a gas in the bubbles) and there is the potential for the mist from the bath to become airborne and inhaled. LONG TERM exposure to the skin has been related to skin disorders and LONG TERM inhalation of fumes has been linked to lung cancer. So if you use stainless, the pieces of dirt, debris, and dust at the bottom of your cleaning solution when you dumb it out dump it out in an area away from the house, with your face pointed the opposite direction. You don’t want chromium in your eyes or your lungs.