Was That Thomas ? 
 That is normal for 4 batteries, you could use 3 batteries for 27 volts, + or - a couple.
Tel Tofflemire
Dewey, az

Boone Nittayo wrote:
Hi,
I made some colloidal silver today and something funny happen. The negative side of silver rod had residue on the rod that looks like fungus and the positive rod was giving out a brown fog that goes to the bottom. Before I started I cleaned the silver rods with nylon cloth and paper towels with distilled water. I used four nine-volt batteries and brewed it for 30 minutes. (I followed the the instructions from the book Colloidal Silver Today by Warren  Jefferson.
 
Ben 
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