Hey, does anyone know how big these puffers get? I was told they get to an average size of 3", 5", 10", and even a foot long. So what's the correct average length for this freshwater puffer? And what foods will make this puffer grow quickly? I've had him for over a year in my 55 Amazon bio type fish tank and he's barley grown a half inch. Is there something I'm missing? Any one experienced in this subject will make my day.