I chose to cover the pond with a "tent" so even with power failure the water doesnt
really freeze. other than that, those further north into 3 country wait until the
water freezes 2-3 inches then draws the water down another couple inches leaving the
ice "cap" with an air buffer no more water freezes. the hole stays open.
Ingrid

"NetMax" wrote:
I'm a 5a until I walk about 100ft up my backyard into 4b country ;~).
There should be special awards of merit for perseverance (or masochism
;~) for ponders in Canada. Power failure + sub-zero weather, and you can
hear the ponders outside overnight, chipping the ice, drinking hot
chocolate, cursing up a storm.


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