Re: video teaching the golden colloidal silver production, step-by-step

That is indeed a nice looking voltage and current controller.

Have you considered using a low cost LED PSU to accompany it instead?

http://www.ebay.ca/itm/10W-LED-High-Power-36V-9-series-1-in-parallel-Driver-P...

Or if you're not interesting in PCB mounting, then perhaps something like this:

Waterproof 1*10W 300mA LED Lamp Power Supply Light Driver DC18-36V AC 85 265V...

NB. It looks the LCD display resolution on that current controller will be limited to whole no's at the mAh level. May or may not be an issue, though I though I'd mention it just the same.

On the issue of production times, the addition of anode rods seems like a good approach. Though I've found better results keeping my cathodes wetted area to a minimum. ie, 5 x 10ga anodes coupled with 2 x single 10ga 304 grade stainless cathodes. I then swap out my cathodes with smaller dia. 12ga then 16ga in shorter configurations as processing moves along. This helps maintain an optimum voltage load in the cell(13-16v in this case) for a 2L batch. It takes aprox. 1hr to process 2L of high grade CS with three cathode changes during production. Since all of my own electrodes are mounted in silicon stoppers, changing them out is nothing more than a matter of pulling them out of the solution and replacing them with a clean pair(placed on each side of my anode). Which is far better than pulling out cathodes and cleaning them during production

As for cathode placement, I've found the ideal to be that of placing a single looped cathode on each side of the broad side of my anode. You can confirm your placement efficacy by monitoring current loads(mAh reading) when adding and/or placing your cathode in your solution(looking at load variance over /maximum distance). I'd also add that there are exceptions in this method when using silver plate anodes. Though I honestly don't think this applies to wire electrodes given the characteristics of electrolytic fields. ie, placing your cathodes on either side of the anode(centrally) and using loop configurations will maximize your wetted surface area and cell efficiency. If you need a diagram or picture just let me know. Hope this helps.

PS. I process my own batches at 98c respectively.