Any thought on something that would keep the ice off with out alot of circulation? I was thinking about something like a soaker hose or something to allow air or even pumped water through it that is floating on the surface in a circle say 10 to 20 foot diameter, Kinda like a soaker hose that is fashioned in a smaller diameter for a diffuser only floating on the surface causing a surface wake thus keeping the ice open. Or even some of the black water line with holes drilled on the inside of the circle so that theres not too much deep water circulation just whats at the surface then run a submersible water pump. I guess that would be limited to those that have electricity down out the pond, I doubt that a air pump blowing bubbles at the surface would cause enough wake to keep the ice cleared now that I think about it.