This topic seems to spring up every other month. Can we please sticky this..

Good quality deionised is FINE. any one who says anything different is very misinformed. If deionised was impure, they would not use it in the pharmacuitical and food industries.

Distilled water of the same quality is JUST as good.

In summery - you can use distilled OR ionised, whatever you can get your hands on will do just fine!

If you stil confused, JUST BUY PRE MIXED FLUIDS. I have used feser orange pre mix for over a year now, no problems, my brother has used both the BLUE and RED premix with no issues either.