I'm toying with the idea of building a colloidal silver generator that uses 3-4 9v batteries in series. Was hoping to get some folks opinions on the effectiveness of colloidal silver as an antibiotic and also to purify water. I have seen articles about the argyria "blue man" and I did do a search of this forum and came across a thread with some differing and strong opinions. But I am still interested in hearing some additional feedback.