I downsizing what I was going to do to a little bit smaller of a tank. I will be doing a 240 gallon instead(96 by 24 by 25). it will have a 55 or 75 gallon sump and a skimmer rated up to 600 gallons.
Now my ? is I want to keep a coral catshark, lionfish, minatus grouper, naso tang, tezzy...