If water quality is ok then within reason i don`t see a problem with keeping large fish in small tanks.
exactly. Although sometimes this happens by accident, when you get false info..
right now I am in a situation where I have two 18 inch yellow finned barbs in a 90 gallon tank. When I purchased them, the baensch atlas volume 2 states that they get 7 inches long, so I did my homework and thought I would be fine..
now, they are 7 inches high, never mind long..
they are healthy and happy, even though they need more space, and one day they will get it:


:WTF:
