Keeping more than one short-necked turtle in a tank is not recommended as they are solitary animals and can cause serious stress and injury to one another. Eastern long-necks can however be housed together providing they are about the same size and the size of the tank is appropriate (180x60x60cm). Always monitor the behaviour of your turtles and ensure they are both receiving the same amount of food, as often one may bully the other and steal their food.