My backyard overhaul journal

[The Guy]

Originally Posted by mike31154

How do you keep the pond from freezing solid during the long Edmonton winters? I lived in the Cold Lake area for many years and the lake ice would be several feet thick! Seems to me your 24" depth could easily freeze all the way down during a cold snap? Even though the koi hibernate as Kien mentions, don't they still need O2, especially considering the size of some of those bad boys?

Ya I guess that was my concern with the fish in a pond 24" deep, that they could be caught in the ice, or do you run your pump all winter with a heat source?