Very much considering get a reef tank setup after I move some tanks around once I have my Fishroom setup soon. I'm either going to use a 30 Tall (24x12x24) I have, a 30 long (36x12x16), or a 40 long (48x12x16). I haven't yet decided, I thought about a biocube 14 or 29 but I'll have to see. I have no problem investing in an RO unit for WCs and topoffs but my local water authority/treatment plant is pretty much #1 in the state and I have next to no TDSs (Nitrate: 0.35-0.8ppm, Lead: 0.2-0.0084 90th%value, Copper: 0-0.085 90th%value) plus I have a friend who has the same water that had pretty good success using just dechlorinated tap water with salt added (of course). Like I said, if I need RO water then I'll save up money for one but otherwise I'd like to save money with my upcoming expenses (Reef Tank&Equipment, Fishroom w/ 24 new or used tanks & wiring and aeration for the room, and finally a new 150G+). So do I need RO water or am I good without it for somewhat hardy fish, inverts, and LPS & Soft Corals?