I use graphite for the electrode. You don't have the nasty chromates with stainless and it won't crud up like steel. It does erode but very slowly. I've been using mine for over a year and it has just slightly rounded the edges.
I use a large roll around charger. It has settings for 2, 20, 40, and 200 amps. I find that the 20 amp setting is more than enough. 2 amps will work but slowly. I think as long as you see bubbles the magic is happening. Oddly the charger says it is supplying 39 amps at 2 volts when set to 20 amps and 12 volts. This doesn't seem to affect the final outcome. BTW this works in a five gallon bucket and a 1200 gallon container.
