"Fish highway" connecting two tanks with acrylic road

As you can see, the two aquariums are connected together like a duct made of acrylic. By doing so, fish can pass between the two tanks. It may be funny like an aquarium when I see it.

The things that became the basis of this idea, other pictures, developed versions and so on are below.
Other photos are here.
http://www.fishighway.com/photos.html

This patent that was issued in the United States in 1877 became the basis.

AQUARIUM
http://www.fishighway.com/patent.html

It is simple as a mechanism, but an interesting idea. This is possible with the same principle as this.

Fishloft - Aufbauanleitung
http://www.fishloft.de/aufbau.html

If this is the case you can manage to manage at home ...