Make your own colloidial silver. Super easy and and cost pennies per gallon. You need two small strips of .999 fine silver, three 9v batteries, a couple alligator clips, two 10 inch sections of coated wire, a glass container (16 oz) and distilled water. Hook the batteries up in a series for 27 volts (Neg to pos, neg to pos) . Bend the two strips of silver over the glass container and deep into the container filled nearly to the top with distilled water (must be distilled!) Attach the two electrodes of silver by the alligator clips to the wires back to the batteries. Let set for about 45 minutes to an hour. The negatively charged silver particles will release from the one neg. side and try to collect on the Pos. side. Most of the silver particles wont make it across to the pos. side and will become suspended in the water. If you shine a bright beam of light through the colloid, you should be able to see a slight haze. At this point, taste it. If you can taste the silver it is strong enough. This is colloidial silver. A true colloid would have no other ingredients. Within a day or so, the colloidial silver should oxidize to a light yellow tint, this is normal. Best to store out of the light and use it up with in 6 months. Works great topically and safe enough to put in your eye.