personaly i would have a rubbermaid or tank set up indoors during the winter for plecos, because they HATE cold weather. This past winter we had 7 freezes, some days the temp would not get warmer than 50, and my hottub cover had a thick sheet of ice on top. Ponds will not freeze (does not stay could enough at night to do that if the waters deep and moving, but the weather is cold! (at least for floridians!)