Get over the chlorine factor as it isn't one unless you are a strict organic grower. Even then I have not seen a side by side grow where a person has given one clone water with and one without.
I grew with RO once (soil grow) and could not tell the difference between the two. Well actually I could as the grow before was better with out RO. Now if your a hydro grower then no comment.
Experience gets you to where you want to go.