How fast do Jaguar's grow? I 've had one for about 4 or 5 months now and he really hasn't grown much. He's only about an 1" to an 1.5"! I feed him 2 to 3 times daily. Do regular water changes. The tank is 55 gallons and is filtered by two Emperor 400's. Water temp is always about 78. I would have guessed he would be bigger than this by now, but nope.