it is actually very acidic in effect on the body. So stop the distilled water. Reverse-osmosis is fine.
pH testing is fascinating stuff, but really just adds to one's stress as you try to get those numbers right. I find it utterly pointless, an exercise in futility. I prefer a mindset paradigm of simply giving the body the things it needs and letting it take care of itself. It needs alkaline minerals in abundance. So long as it is getting those, what your readings are don't matter all that much. Go by your symptoms instead. Are you feeling better? Then fine! How can these numbers mean that you're doing worse??? Is that logical??? NOOOOOOOO!