Ditto what Bo says.
You tank won't be big enough for all these adult fish.
Scrap the tang, and consider a smaller lion species one of the mid sized lions, like antennata, radiata or mombassae or dwarfs lion sp (P Volitans will easily reach 15" in 1.5yrs-to big for this tank).
Lastly, the white tipped trigger is not a planktonic feeders (I saw one this weekend), looks like a rhinochanthus species. It might take control of this tank in a way you prolly won't like.
frank