Such a waste, that tank was a FW
I'd have a 25 000 gallon Shark Reef. it would be build to have a drop off.
Basically, rock on one side, stacked up nearly to the top, full of corals. A semi-steep pitch with overhangs to a large area with sand, some rocks and gorgs, suncorals with a black tip reef shark.
Basically recreate an
actual reef.