Quote:
Originally Posted by lammarkk
grouper and lionfish?
since you are planning to get a predator tank 
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Most Groupers get way too big for a 90 gallon.
I suggest you actually try to narrow it down a bit. That's quite a few fish for a 90 considering the size that some of them get and the ammount of bioload they'll be producing. Voltains get big. When I had one I ended up moving everything else out of my 90 in order to give it more room.
A mixed trigger tank would be nice. Provide lots of rockwork and make sure everyone is well fed and you should be fine.