RO could be a decent source(much better than tap) but I'd insure the source is reliable. A ro/di system can pay for itself over time and is a much better water source...but I'd go with a local source of RO if nothing else is available. I purchase ro/di from a local company that previously had only RO for drinking water(and ice production). The owner is also a hobbyist and a few years ago started selling RO/DI to folks in need of a quality water for aquarium use. It seems I've always considered a RO/DI unit at the house but never have got around to it. I just get 12- 5 gal containers filled about every 10 days or so...it does help that the owner gives me a discount(.15 per gal is all I pay) the going rate to others is .30 per gal.:thinking:
The places that scare me are the vending machines folk use for RO drinking water...there are a few in town and I've always wondered if the filters are ever checked? I know the owner of my source and believe he stays on top of things real well...at least I trust that he does...the vending machines I have no trust in at all!