I found this pic on the Internet.
Apparently Mrs. Brown in the picture is using it on her Fish farm (converted from a Dairy Barn) for shrimp culture. Also in the pic is Rob Rode a researcher and manager of Purdue University's Aquaculture lab. I just found this and I'm contacting them about the pros and cons. (They're both in Indiana and I know them.)
These things are much less in price than conventional metal swimming pools and easier to ship. I see a 15 foot pool is in the mid 300 range with free shipping anywhere in lower continental U.S.from Ebay.
Anyone have one for swimming? If so how do they hold up?