Thinking of upgrading to a 180 AGA with the dual overflows and the standard stand. What is the largest glass aquarium that will fit within the standard tank stand. I currently have a 40 long under a 125 and was thinking of upgrading that as well. I think it is over kill, but I was also thinking of doing a custom stand to fit the 125 long I currently have as a sump. Any info would be apprecitated, as I am still in the thinking stage.