I thought you would've checked it all out before you put forward the idea of SB being some sort of authority on the matter.
You might ask him or his tech dept,(and all the CS companies for that matter so youll know the important,sensitive and most factually based questions to ask) but his answers are pretty much all on his web site.
For me it's obvious that he has done involved considerate research and come to his conclusions because of that research and then developed his CS maker based on that research and now his unit is the most popular because of it's being insync with the facts of C Silver research and proven by it's efficacy in use.
As he says, all C Silvers are Antibiotics , it's just whats the most practical, cost benefitting and efficient choice.