I just did some math and 6'L x 3'W x 4'H would give me roughly 538 gallons. My uncle said he can get me lexan or glass at a decent price. Buying a 5'x3' sheet would prolly be a good bit cheaper. Now I just have to figure out how thick my glass would need to be. I'm lovin this idea. Plus with it being smaller I can do one at a time. I'm not sure if I want to have them all hooked to the same filtration or not though. I mean work-wise it'd be a lot easier, but if I get a disease or need to treat a tank I wouldn't be able to.