I make it my business to separate the TRUTH from all the lies & distortion out there. The subject of Colloidal Silver was especially tough to find the TRUTH.
Also, that expensive "Generator" for a foot bath is also a SCAM. Simply use any old 48 volt DC power supply for $9.95. Also, do NOT use tap water for that foot bath. Use only pure distilled water. Tap water usually contains harmful additives such as chlorine, fluoride or worse.
What specific question do you have that you are troubled by?