Buford said:I did two batches with reverse osmosis "bottle your own" water from the grocery store. I still have to wait another two weeks to see how it came out.
Water free from all impurities - distilled - tastes "flat" and just not very good. You expect some mineral and ion taste in water, and you notice the absence if you try drinking distilled water. The reverse osmosis stuff tastes like decent water, so there's still something in there, just probably at low concentration.