aldiaz33, specifically we do not agree on silver aro's requirement(if I have gotten rid of my stock I believe I can put a silver aro or a Australian Aro in it. I also do not agree with Jose's various assessment of peacock bass. Otherwise I have no intention of arguing for keeping Arapima in a tank...I don't think I was arguing about that.
As for the monsters, when I started off in this hobby, I did successfully raised a RTC from 2 inches to 24-30 inches in a 100 gallon tank(a little over a year); thankfully that was a glass aquarium and I traded him in(lucky) for something else. In my current 300, it came with the default openings. If I have gotten a RTC and it gets say 3ft long and wider that 12 inches, I have to cut the fish up to remove from the tank
Not so much into that 
As for the monsters, when I started off in this hobby, I did successfully raised a RTC from 2 inches to 24-30 inches in a 100 gallon tank(a little over a year); thankfully that was a glass aquarium and I traded him in(lucky) for something else. In my current 300, it came with the default openings. If I have gotten a RTC and it gets say 3ft long and wider that 12 inches, I have to cut the fish up to remove from the tank