How long will the rock be out of water? If the rock is out of water long enough time for organisms to die, I would wait for a little bit to add fish because the dead organisms could raise the ammonia levels in your tank.
[CENTER]Please don't forget about the toxins in some corals (like zoas and palythoas)
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After you see no ammo or trite and u see trates your good.
Just do a pwc to get the trates down then add one fish at a time (or 2 if theyre going to be a pair) and wait till your tank is stabel, another one, etc etc.