That is what I just said. for every inch of length you add less than every inch of height. that is why they are equal sized tanks.focker;528258;528258 said:no oddball was right. it worked out exactly the same for a tank that measures. 72 long 24 deep and 24 high as it does a tank that measures 64 long 24 deep and 27 high. same amount of gallons. my buddy picked it up and its custom built out of angle iron and we measured it and thought it was more like a 160 or so instead of a 180. must say we were kinda surprised that the 3 inches in height makes up for the 8 inches in lenght it was missin.![]()