The only fish in this tank that is left that I truly care about is my 15" Tiger Oscar (Bruce). If I can find a home for all the other fish in this tank (which would all need a bigger home eventually anyways), then I think I might just keep Bruce and move him to a 75g of his own, with maybe a pleco, and convert the 220 to a saltwater tank. The only thing that's been holding me back from doing that has been the arowana, but now that sadly isn't an issue anymore.
I'm really going to miss him, waking up to what looked like an empty tank now wasn't all that easy this morning.