I walk around the pond every day. Every time I do, I look down at where our gravity-feed water line flows in, to make sure it is still flowing. We keep the water constantly flowing through the pipes during the winter to prevent it from freezing up.
We haven’t had any really cold weather so far this year, but even when we do, the little area where the waterline outflow is, remains ice-free because of the water circulation it causes and maybe its slightly warmer temperatures.
On the photo above you can see the area of open water caused by the outflow on the lower left, and the ice that covers the rest of the pond.
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