Did you link the wrong tank?
Being no turtle expert... However that tank seems very wrong for anything but fish. It is not very long or wide, but tall.
Do turtles not need some area to move in rather, eg. Length and width rather than height, as they do not really climb as far as I know anyways?
Moved from Enclosures to Other Reptile Discussions>Turtles and Tortoises]
************************
Malon3r is right. Turtles need as much room to move around as a beardie. In addition, they need to be able to easily swim to the top to bask.