T. Pasionis or whatever are gorgeous. Like yellow fire mouths. I've seen mature fish that scintillate pink and tons of other colors besides yellow too.I've been wanting to do something similar. I was thinking a group of t. Passiones and t. Mac. With some wild type livebarer like p. Petenensis.
I think I need to clear my basement out and add some more tanks lol. But I would also have to install a sink.