my roommate just bought a wall aquarium, He said he got it for 120 bucks. I think he also said it was used. Its 3ftx3ftx6 in. I used an online calculator and it said it was around 33 gallons, though Im not sure if thats right. He doesn't know anything about fish really,but I can point him in the right direction. I have a feeling halfway through the year I'll be taking care of it. The first thought I had was the wall studs, but he said that it comes with a special mounting kit. But we'll see how it goes when we both move in during the fall.