[SV650rules]

Originally Posted by johnnyrod

Water: Deionised is the name of the process, it doesn't (read: can't) just remove positive ions,

There are anions (positive charge) and cations (negative charge) that get removed, but this makes water chemically active (the dissolved solids that make water 'passive' get removed by de-ionosing process)

Excerpt from an article.

Placing the electrodes of a pH meter into a beaker full of deionized water will result in a somewhat meaningless value. This is because deionized water has a very low ionic strength (most if not all of the dissolved ions have been removed) and it is an extremely aggressive solvent when in this state.

This company (link below) warns about using deionised water in cooling systems other than ones using special metals which will resist action of the aggressive water.

http://www.lytron.com/Tools-and-Tech...eionized-Water