Agree with the above.
You may want to question why it was given up.
If it was simply because it out grew the previous owners tank, no problem?
Or was it because it killed all the previous owners fish?
There may be extenuating circumstance with the above though, maybe kept in too small at tank, or with inappropriate tank mates.
These cichlids come from southern Brazil, and Uruguay where temps are a tad more temperate than many of the more tropical species, and if it was kept too warm, that might account for any unchecked aggression.
I kept mine at room temp, around the 70sF and one pair spawned outside, in a pond in Wisconsin at temps in the mid to high 60sF.
The braziliensus clade is slowly being broken down into a number of separate species, and (as Ryan said, may be put in a different genus).
I have kept 2 species, the normal/generic braziliensus, and what is now G iporanguensus (below) defending their territory against a much larger tank mate.
