Colloidal silver generators, colloidal silver liquid products, formulas containing colloidal silver and accessories. Colloidal Silver is the most powerful natural antibiotic known to man. Colloidal Silver is defined as a very small particle of silver, .01 to .005 microns in diameter (four hundred thousandths to twenty millionths of an inch), suspended in a liquid medium. It is most commonly produced today by passing an electrical current over a couple of silver electrodes immersed in distilled water. This process forms an electrical current in the liquid medium causing silver particles to become suspended in the water.