It's a schtick that some CS gen manufacturers use. The Silvergen and Silverpuppy CS gens both produce "nano" CS. So do 3 9v batteries and silver wire. If you want the smallest "nano" particles then you need stirring and current control which the Silvergen and Silverpuppy both have. I don't know of any other home CS gens that have stirring , current control, and auto shutoff.