our pond has savio equipment [skimmer , waterfall bucket , pump] and i'd like suggestions on winterizing in zone 5 . what i really want to know is this : do i leave skimmer barrel full or empty it which would mean lowering water level . i thought of putting a baffle over skimmer opening so i could maintain pond depth . i know to drain lines and remove pump just puzzled over best procedure for skimmer barrel .. .peace