I bought some reagent water in a 5 gallon box, NERL. You can get it on eBay but I bought it through a medical supplier. Anyway, I started freaking out because some say it's too harsh. Visions of damages seals and a nonfunctioning unit not covered by warranty, etc. etc.
Can't understand it, like water ought to be water, right? I wound up switching back to Aquafina à la Fremer. I think Laura uses this also.
Unrelated to the specifics of this topic, but it does have Audio Desk content!
Paul