okay, so some good basic advice,, make sure to test your water before adding anyone... to make sure all your bad levels are are zero....
also have you thought about what you are going to put into the tank yet? sand sifting gobys are out because of the crushed corals,,, as with any wrase that burrows (though i dont think there is anything small enough that would fit anyways) so??? what are you thinking?
what books do you have also? there are some great ones out there to help pick out fisha and explain the setup and maintenace of tanks...