i recently got intrested in keeping a gold arowana. want to raise it from when its a baby. planning to get a 120g tank and get three 4-5" gold arowana. is this the right tank size and would they out grow the tank. need more info please. what do you guys recomend and wat setup do u guys recommend? and is there things i need to noe when choosing tank, filter, food and such? any imput will be much appriciated.