It will do the job. The Sota has a current limiter circuit that limits the current to 1.5 mA. Doesn't have an automatic turn off so you will have to time it, or use a conductivity meter. No stirring mechanism either. I made a good batch checking it every hour and stirring it with a conductivity meter.
Generall if you let it run from 2 to 4 hours in distilled water. You will get Ionic silver more than good enough for the Beck Protocol.