Most likely you will be fine. Some plecos are capable of producing leaks through lining, but these are few and far between, and I'm not sure if your species would be capable. Is it pretty warm in chicago then?
I had one in my pond but I had to bring mine in every winter. I did that for five years, this one being the last it just got way too big. I was putting it in a 50 gal. drum that I rigged up with a heater and canister filter. I decided to give it to a friend with a 150 gal. tank. It did a really good job in the pond though and was pretty cool watching a 19" pleco. Kinda looked like a shark swimming around from above.