I have about 8 years experience and experimentation with Ionic Silver and true colloidal silver. Things I have discovered.
All colloidal Silver Generators produce Ionic Silver.
Ionic Silver must be reduced to make true metallic Colloidal silver.
Ionic silver: is only good for use topically skin, eyes,cuts,
acne,mix with hand soap to kill virus. disinfect counters door knobs and other surfaces. If you ingest ionic silver it is affected by your stomach acid and turns to silver chloride once inside the body and is only about 10% to 20% affective. It also can get trapped in cells and have a higher chance of causing argyria grey blue skin about a 10% chance of this happening. You would have to drink large amounts of properly made Ionic Silver daily for this to happen. can only be made stable to 23 PPM
True metallic Colloidal Silver: is good for internal use for many problems. Flu cold, sickness,virus,bacterial infection ,food poisoning. It is not that affective for topical use because it is capped when it is reduced from Ionic to true colloidal Silver.But is is not affected by stomach acid does not turn to silver chloride and 90% or more enters the blood stream. It passes thru the body does not get trapped in cells and has very little chance of causing argyria.
can be made stable up to 320 PPM. 20 PPM is all I use for ingesting. It has worked for sickness in 24 hours or less every time.

The formula I use to make ionic or colloidal silver is

Time = Milliliters of distilled water x PPM X 0.015 / mA of constant current.
So I have 1050 Milliliters of distilled water that I want to make to 20 PPM using 1.5 mA of constant current.
It would look like this
210 min or 3.5 hours = 1050*20*0.015/1.5 mA
you can make any amount of liquid silver using this formula just change the milliliters of water or PPM or mA of constant current.

After experimenting with several machines I have found 33 volts of DC and 1.5 mA of constant current works best with 10 gauge 9999 Silver wire . You can make 1 quart or liter 20 PPM in 3.5 hours. The product is excellent quality and can be made in a short amount of time. you can get a 1.5 mA constant current diode E-152 from mouser Electronics for 2.31ea
[link to www.mouser.com]
hook the striped end of diode to negative side of power supply. Connect the other side of diode to the cathode or negative side of colloidal silver generator. This will give you a constant current colloidal silver generator.
I will post in a update on how to convert ionic silver to true colloidal silver when I have time.