$147! How many pounds? Seems like alot. But its got coralline algae on some of it so I'm sure the one piece was "premium". I remember that part of that hobby was so annoying to me. Still is apparently....lol.
I answered in your other post too. I think a dwarf angel would be nice you could then also get a couple smaller fish like firefish have a nice little tank.
If it's fowlr you could put some blade caulerpa or dragons breath algae if you can find it, just for some added interest. I had an 80g display refugium that was quite dynamic with just a few different algaes and a few fish. I had a group of talbots damsels in there for quite a while started with 6 and was selling them for a couple years after that.