Not to discredit this or anything, but wouldn't it be much much cheaper if online retailers (ie Petra's) simply advertised and shipped known brands of distilled water that are more than fine for watercooling purposes? I for one know that distilled water available here in California (ie where Petra's is located), has pretty high purity, is greatly inexpensive, and perfectly suitable for wc needs with a silver coil. Your effort and constant innovation of available products are commendable, but I'm just curious towards this more expensive approach.