I just picked up the tank yesterday and here's a photo:
I turned out to be 30"x18"x17" (lwh) and the builder did a pretty good job on it. It initially came with euro bracing but that came off right away - I just like the plain top look more. The inside measurements and my predicted water level make this tank about 35gals; with the expected output of my two pumps, I am figuring that I will have 40x's turnover! There is even room to add more flow if needed (not needed) because my bulkheads are 1.5" but my current pumps have only 3/4" fittings

.
- Chad