I run an artesian well into one small corner of the pond, the water comes out hear right about 72 degress. I do this to try to provide a small corner of the pond with a warm water refuge incase we get the occational harsh hard freeze we get in North FLorida. The tilapia and couple others in the pond can be a little sensitive to colder water during these times. the goal is to just have one small corner stay above or near 50 for the short duration we might get a hard freeze.

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