If you want to teach your Tokay to drink from a water bowl, you can--just use a bubble stone in it. The aquarium pump should be very small and use a very small amt of bubbling. Battery operated ones are great.

Don't bother with Exo-Terra's waterfall. It splashes all over the place making the tank soppy wet. Very hard to manage. Plus you can't get the electric cord in there.

You can manage with a single bubble stone since the tubing goes through the screen.