I'm an oddball and catfish guy but I'm giving my wife my 29 gallon to try and get her into the hobby. She likes the Angel fish a lot but I saw they get to 6" which is a bit much for the 29. How long does the journey to adult hood take for these fish? Also are they schooling fish? The tank will be pretty much devoted to them with the exception of a banjo cat for cleanup and an unknown pleco (no one can figure out what it is, tried plecofanatics and planet catfish, it's very cool looking though). Anyway, the tank is already established as I had some other fish in it that I moved to my 55, filtration is an Aquaclear 300. Would 2 or 3 be a bad idea? We can always upgrade the tank when needed, at least this time she won't be able to complain about getting a bigger tank