What do you do when your Turtle gets too big for your tank?

If a turtle has outgrown its tank, it will of course need a bigger tank. Expecting a turtle to stop growing only leads to malformed bones. Because many commonly kept turtle species grow so large, it's best to start out with a 55-75 gallon tank or larger; many owners of adult female turtles such as sliders end up using stock tanks for indoor or outdoor mini ponds.