I am trying to find a way to stop the water around my outflow tube from freezing this winter, without using any electric heater or such. I am going to use my bubbler around my dock, but the outflow tube is too far away to reach with hydro. I can expect up to 1 foot thick ice in the dead of winter... possibly even a bit thicker. I am afraid that not only will it stop the outflow from leaving the pond but that it will crack/destroy the tube as well.

Does anyone have any ideas on how to stop a 5 x 5 foot area or thereabouts from freezing without using power?

Owner/Builder of Ottawa Canada's first official off-grid home.

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