I was just browsing through some threads and came across a post about the behaviour of water that is 0parts per million. I have seen Ionics selling a system that produces pure water in the parts per billion range and was wondering if it really makes any difference considering the radical increase in price. I am really only asking out of curiosity. Sometimes things like this make a marginal difference, but sometimes that extra few zero decimal points can make a huge difference. Does anyone have experience of this that can say if it's worth the extra money?