Not with a 180gal, it's not.
I'm setting up a 320 for a friend, at his fish store...he calls me when he wants plumbing done, big tanks set up or my advice/experiance with large predator fish (he's a reef guy).
We did all the plumbing today and put in a 3" black sand bed.
I'm going with a Louti Grouper, adult Orange Should Tang (which he already has), adult Purple Tang (which he already has), he wants a Whitespotted Bamboo (which I'm trying to talk him out of) and we're still deciding on the other inhabitants.