I looked in several books; it always seemed that the tigers were dark with lite spots. This guy seems the opposite. But after looking at the link you sent, I see that the variation exists....so, oops, this guy goes back to the wild. Is anyone sure that he isn't a marbled salamander?
As for his aquatic life; thats his preference. The tank is half land.
As for the setup; the bottom is a piece of drop ceiling lite grate, with fly screen siliconed on.
It acts like an under gravel filter, in a fish tank. In my case the pump is outside of the tank.