Maybe this is a very stupid question , newbie's question
 

Hello ,

Maybe this is a very stupid question .

Is the water used in the water cooling system are normal water ? or it has been added with something else ( chemical ) ? or it's liquid ... ?

Thank

it's usually distilled water with an additive (WaterWatter, antifreeze, ...) to prevent corrosion and alges

The only stupid question is the unasked question. I've ran my system without distilled water, however; it's recommended because of the absence of electrolytes. If the water were to spill, or leak the distilling process would have removed those conductive elements, preventing a short-circuit.

Here's what happened to a system over at Dan's Data. See if you can figure out why he basically turned his water-block into a battery; http://www.dansdata.com/burning.htm

good info there Liquid3D, thanks for the link!