Join Date: Jul 2013
Location: Gainesville, FL
Check the jugs, oftentimes it will say in fine print somewhere on the label if it's from RO, distilled, etc.
I have carnivorous plants which require fairly low TDS and have used a lot of different bottled waters...usually the ones I use are labeled "Drinking water" and from RO. Walmart's has seemed to do fine but I don't have any specific TDS readings...yet.