For my water dragon tank/cage i just used nice plywood and glass. I made it 4 feet wide* 2 feet deep* and about 5 foot tall. I divided the tank into thirds and the top 2/3 were full of plants and tree branches, and the lower section was a water area. i just cut a 12 inch * 12 inch square out of the divider to allow the dragons to go where they wanted to. They seemed to love being able to climb five feet into the air to sleep.