To condense daplatapus' generous input ( and thanks for it ) ....
I fully agree with the idea of QTing all fish
Even though some may be inclined to add their first fish right to the DT, I will not
I have just finished filling the QT with RO and am getting it ready for new fish, regardless if they will go into the tank before corals or after
With that said, we will probably buy one or 2 fishes tomorrow as I saw a couple today @ J&L that I'd like to have. They will go into the QT for weeks before going into the DT ( I think I've made that clear already

)
So, do I start with corals, or do I start with fish ??????