Welcome to PBF.
I have heard Bill Cody talk about SMB only ponds. That might be something worth asking about for your size pond and the fact that you want it for swimming.
If I were swimming in that northern lattitude, I would consider wearing a dive skin or a 1mm wetsuit. Both are easy to don, help with a little warmth, and should mostly eliminate any nipping problems with fish. Look up a place called Wetsuit Warehouse or Leisure Pro on line.
Last edited by snrub; 01/10/19 12:36 PM.
