I just got a dog faced puffer and put him in with an undulate or bluelined trigger in a 55 gallon tank.Does anyone know if this tank is the right size for him?The undulate bit him over a peace of food but they seem alright are these fish copadible or is the undulate to aggresive for any other fish?I had to put a tank divider to seperate them because of the one time he bit the puffer.The puffer is alot bigger than the trigger.I would like to get rid of thr undulate trigger and leave the puffer in the tank alone.Any suggestions.