As long as the compressor does not get damp nor accumulate condensate over winter you should be in good shape to just shut it off for winter. Make sure snow does not blow into the cabinet. It it were mine, the compressor which is an expensive part of the system, I would move the compressor for winter into a garage, barn, shed or other building for winter. In Ohio I suggest that aeration can be shut off around Oct 31. In MO you might want to wait until Nov 10-15. By then your pond should be fully circulating. You can cut the run time in half now until you shut it off.
Thanks for the input Bill. It will be no problem for me to unhook the compressor and bring it inside. I will keep running it until sometime in November.
