I'm planning on setting up a 75 GAL tank in the near-ish future for an oscar. I'm planning on putting a featherfin Syno in there (grows big enough to hold it's own, and isn't another cichlid) and maybe a green terror. I bought the GT as a blue acara, but I'm becoming more and more sure it's a GT. It's still only maybe 3" long. Has anyone had any experience and/or luck with that combination? I don't want to do it if seems like a bad idea, but the GT can't stay in his current tank for good (only a 38gal) and I would like to keep it if possible. The GT also isn't really being that agrressive either (maybe because it's young?) Thanks for the help 
P.S.- I'm probably going to go overkill on the filtration.

P.S.- I'm probably going to go overkill on the filtration.