How many gallons do you have? They grow relatively slow, but overall it is going to be a fair sized fish with a big bioload. I have mine in a 120, but you could get away with smaller if you get a small fish and it would probably be ok for a couple years. IMO you could probably start with a 55 if you have a huma that is only a couple inches or so and it could stay there for a couple of years. In a years time I don't think mine has grown half an inch. With this size tank I would probably have it as the only inhabitant however, they can be very aggressive, and it does not give others much room to work with.