Yeah, it's true that they can get shallower and hotter, therefore, less oxygen. That's why they have the Labyrinth organ, to breathe air from above the surface. But they can jump from those puddles to find another one, they can't jump from the above conTRAPtion. I don't see the point in spending "Just $55.00!" on that thing when you can get a larger, more functional tank for much cheaper.