Opinions will not give you results, expert advice will. This advice and expert status is tricky and I recommend doing a little research or reading up on a member before you take their advice. On top of that the proof is in the pictures. If you have never used IO salt than why even answer this thread? I have ended up using IO myself and the Reef is thriving. I am no expert, but it took me along time to figure out not to take advice from those that have opinions and not results. Tap water in a reef, Really? That is not good advice and while I try to be polite, that will not be good for anything alive in your reef!
This is why I just read Randy's articles if I'm looking for something. Some are a bit too in depth for my brain though. Haha but you are guaranteed hard facts from a expert, not someone who might possibly have ulterior motives.