ewurm: I'm going to stick with them, before I had the first set i had:
A Florida Gar 9 Inches
Clown Knife 8 Inches
Silver Arowana 9 Inches
Pacu 6-7 inches (don't remember)
Oscar (Same as Pacu)
Sun Catfish Around 7 inches (Didn't last long after tank cleaning)
Wolf Fish (Sold it coz it was an aggressive male)
Housed in that same 20 gallon. Of course I had to kill the decor for space, but they never complained. As soon as I move from my mom's house i'm getting my brother's unused 55 gallon and putting them into there.
Aquarium_Fish: Yes I know how big Pacus can get i grew up loving them.
Remember I have baby fish so they have more than enough room right now. The current ones which is the first list is what is in my tank. I will post pics of the tank and some vids and ge ta dairy as time goes on so you can see how they progess in my tank. Although Pacu's grow large they ususally grow like oscars to the size of the tank unlike so other fish. mostly I will be giving up decor as the yget big.