If you are about the place indi, you did say the results of a 4 electrode generator may be of interest so here is what I have at the moment. 1115ml Pure Water, incorporating 50ml of pre-mix 9ppm solution as seed, and using magnetic stirrer. Started with solution of 7ppm and run time 1 hour to finish up with a 26ppm solution, (didn't clean the electrodes for the hour either). Thought I had everything clean but as the end solution finished up with a slight milky cloudiness I guess I didn't. After 72 hours solution had dropped to 22ppm and this is where it has stabilized. After a week the solution has taken on a 'pink-ish' tinge, however, as there has been zero fallout throughout entire time frame I am not dissatisfied with the results first time round. Made another batch this morning using 1100ml of just Pure Water with no seed, 1 1/2 hour run time and stopping production at 19ppm, cleaned the electrodes every 1/2 hour and swapped anode/cathode over, this resultant solution is clear and will monitor it and see what happens. TE seems to be pretty much comparable to other batches I have made in the past, (while establishing a repeatable result production process), some have had strong TE and some faint, on a scale of faint/medium/strong I would say it is in the medium catagory, again I'm not dissatisfied with that either but will observe what changes there may be over the next 72 hours or so.
Cheers...N.

