Distilled water would work as far as I'm concerned...my loop leaked on my operating computer and I cleaned it up with some alcohol and the PC worked fine using distilled water
Also, as a cooling method it doesn't really work well...true the water initially keeps the core cool but eventually your processor will heat up the water...heat can't go anywhere so your processor overheats and dies
Also, as a cooling method it doesn't really work well...true the water initially keeps the core cool but eventually your processor will heat up the water...heat can't go anywhere so your processor overheats and dies