Hi ya, I have recently upgraded my 2 Oscars to a 120 gal running two emporer 400 filters. I wanted to add a ouple of fish with them so I picked up 2 red tail tinfoils and 2 Black banded leporinus. The oscars are doing great with them no probs. I decided to add one more larger fish so I saw a 5-6" Red belly pacu and thought it looked great. My question is is this too much for a 120gal? oscars are 7" & 8". 
