I was wondering if you knew what the pipes were made out of as well as how the bricks Super mario fish tank decorations staying up like that? After purchasing the two aquarium hoods for the Super mario fish tank decorations, it started to feel real. That's the wrong box for the shroom to come out of That is a "third level" castle. Stupidly, I went to Lowes on my lunch break without planning out the measurements prior and purchased two pipes that ended up being the size of the small castle, so a second trip was needed before finding the right size. I was 23 and living with my parents at the time, but so clearly remember him posting the picture to my Facebook wall and challenging me to recreate it, knowing my crafty background.