In my 29gallon, i recently added 2 angelfish form my LFS. they are the only things in the tank, and they are still quite young, maybe 2-3 inches, from the very top to the very bottom of their fins. I noticed that they don't really hang around together. One seems to pick on the other one a bit as well. He will make runs at it and scare it to another area of the tank and will do this a few times. The aggressive one explores the thank much more, while the other just swims by the glass and stays near the top of the tank. However sometimes when i walk in the room they seem to be peaceful together but if i stay and watch i can see the aggression by one of them. What should i do? any ideas? there are some tall cypts and vals that run to the top of the tank to help block the sight of vision.