i got one of these. Charax gibbous right?
I call mine a wanna be payara. Iv'e got mine in with 2 scomb payara and 1 Tatauaia payara and 2 hujeta's. And the little charax shoals with the payara. It pretty neat to watch him hang with the big boys.
I would love to have a big shoal of them. They are such a nasty little pred and alot easier to take care of then others. Mine will eat flakes, feeders, pellets, algae pellets, just about anything that hits the water.