I am thinking about aquascaping a 20 gallon tank to make it look like Bag End from The Hobbit, I would like to know your opinions and ideas on what I materials, plants, and fish I should use to make this dream a reality. I know I would like to make the hobbit hole with the door open, thus making a cave for a fish, but I am unsure what materials to use to make the cave and what paints to use on the door and the little details. Please tell me your opinions.