If you are on a tight budget, You can also make your own generator using Esstee's brilliant design using a 1 milliamp current limiting diode:
Wiring the Diode by Esstee //www.curezone.org/forums/fm.asp?i=2259054#i
Where to buy the Diode by Esstee //www.curezone.org/forums/fm.asp?i=2258964#i
Diodes from Amazon.Com Link
It will work better with 3-9 volt batteries in series or a 24 volt DC power supply.
You simply let it run until the color of your batch is a slightly yellow color as detailed in this file: http://tinyurl.com/silver-generators
Whether you use a potentiometer, or a current limiting diode, you get superior nano sized ionic silver, as proven by the laser light testing.