"Ole Bob":
 
I got this misinformation about 20 years ago.  I was in a metaphysical  
bookstore, and saw a do-it-yourself colloidal silver kit costing $20.  The  kit 
contained a zip-lock bag, two silver sticks, 2 alligator clips, a drawing  and 
written instructions.  I don't remember now if the water was supposed  to be 
distilled, with a pinch of salt, or drinking water.  I do  remember having 
problems when the water was too pure because the process  didn't seem to work.  
Perhaps if I had used distilled water, and just  waited long enough (and had a 
way 
to test the PPM as I do now), it would have  eventually made a good grade of 
CS.   
 
Jill