Hello, new here. I became the owner of a tank that I have no idea what make it may be. It is 47 3/8 inches long. 13 1/4 inches wide and 30 inches tall. The glass is 1/2 inches thick. It is an older tank. Any one have any information? Because of the thickness of the glass I am calling it a 75 gallon. Any help would be appreciated.

