They do sell large tanks, but you may have to ask for a special order for anything larger than a 150g. Glass tanks are the typical stock. For the larger tanks, it's mostly Marineland and Marco. If you have any questions about special ordering, absolutely go in and ask, everyone there is more than happy to help you and see if they can order fish or equipment that you want/need.
I don't work there or what manufacturers they use but they do have a 125 gallon glass tank in stock and had a 220 in stock awhile back.hope that is helpfull
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