This is for my wife's tank so it's purely research for now.

The 60 gallon cube tank's already cycled and NO3 levels are undetectable, which I've read is critical to the health of these guys. Got her a decent set up with about 70 lbs of live rock, Euroreef Skimmer, and 4x24W Tek fixture. Only one lonely female ocellaris clown is in the tank for now.

As far as size, yeah I knew they increase in size multiple times over. I remember a huge one Gallery of Pets used to have in the mid 90's. But, my wife will inherit my 90 gallon next year, so I can get a 200+ gallon room divider tank like your's Ace.