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i just found this website where they make customized tanks
they will make them up to a 45,000 gallon tank
and in almost any shape and its cheap you can get a 100 gallon
glass tank for about $169. But the only problem is that they only
allow pick up(they live around LA) and they will ship to a
100mile radius around las angles, California

http://www.crystalviewtank.com/prod01.htm

glasscages.com is a similar type deal....located in tennessee....i believe you can pick up an order at shows in your area w/o payin for shipping....

I would love the 120 gal. I was looking at those when I got Frankie's tank.

New 45,000 Gallon 240x240x180 $3,599,999.00
Wow! Can you imagine??? I would love to see a picture of that!

Who in their right mind would by a 45,000 gallon tank for over $3 million?!? I can just see that, a little tiny crack and all gone ... If I needed that big of a tank, I'd just buy a swimming pool.

Well, I think a 45000 gallon tank would be for an aquarium, or hotel or something like that. Even in the Vancouver airport there's a huge reef tank that's probably at least 15,000 gal. You wouldn't want just a pool, because it's not the same as looking the fish (or turtles) in the eyes.
For cracks, I'm sure there's a way you could patch it. Plus, a tank that size would have glass/acrylic that's at least 1" thick, so it's not likely to get a crack, unless you're pounding on it with a hammer or something o.O

would probably come with a decent warranty and you would definitely take out an insurance policy with that kind of price tag