I've seen places that carry non-custom up to 1050 gallons. It's just sometimes hard to picture how things will wind up laid out with different heights and widths. Easier seeing them to get an idea of how square or rectangular a tank is. I think I may wind up with something around 96x24x36 or so. Leaves enough rooom in the stand for a good size sump and refugium (yeah, yeah, i know it should be above the tank
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