one fill try and both will end up dead... I had a 5 in pixie bust out and end up in my budgetts tank lets just say the 5 in budgetts ate the 5 in pixie. even if one doesnt eat the other they WILL get in to a fight sooner or later and niether will come out of it in good shape.. get a second cage, tank, tub and seperate them before it happens and you regret not doing it sooner.