I don't have more information right now, but I assume it really doesn't matter how it's done, as long as the end result is chlorine dioxide gas in distilled or filtered water. Use your favorite method.
pam wrote: Karl, how is he making it?
Which activator? This is actually just a slight increase over what we currently do - which is 8ml of CDS in 1 liter of water. Did he indicate why the change?