I have little experience in making large tanks so I just want to know, if I have a 10 foot long tank that's only 2 feet high, how thick does the glass have to be? Can it just be the standard 55 gallon tank glass or do I need thicker glass, I was thinking take a 120 tank and take it apart and make it a corner tank so it is 6' by 6' by the normal height, but I'm unsure if that would work or notaldiaz33 brought up an important point, a 40” tall tank is going to cost you. The taller the tank, the thicker the material builders have to use so price goes way up. Definitely talk this point over with them when getting quotes