There is also an explanation of what a TDS Meter is I have one also. I
bought these items half price on ebay. Since I have been taking
colloidal silver I haven't been sick, which is a miracle with my
CRPS/RSD. I am usually sick bi weekly with something, since my immunity
system is constantly being bombarded with RSD pain and stress.
I have been inspired by reading about the black plague and how the "Blue Bloods" stayed healthy and didn't die, they were usually the wealth people. Research has found that the poor people used bowls, plates and eating utensils made of lead based metals.
The rich ate from silver bowls, plates and eating utensils. Researchers have surmised that it was the silver in the utensils that saved the wealthy from the black plague.Here one website that sells the TDS meter and the Colloidal machine
http://www.naturesalternatives.com/silver/csfaq.html
(I am not affiliated with this sight for show and tell purposes, there are also other sites that sell these things...check froogle.com also)