ordering live rock is ok.....the tank will cycle faster with it....but as in ordering coral...wait a bit on that! Do you check the wate peramiters? Might want to get a kit....the first few weeks, they are all over the place...i dont have a nano, but i know when i set my 92 gallon reef up it cycled for a month or so before i added a fish....coral was about two months...i tend to take my time on adding things...less troubles that way..PATEINCE....thats a key word in this hobby ive learned! That and knowledge...and this site will help you with that.