Pond Boss Forums POND CONSTRUCTION Creating habitat Heat a pond

I have not experienced it, but since I don't have aeration yet, I'm safe!

Actually, yes, I've read on here about instances of supercooling leading to widespread kills in ponds. No argument perceived, man, just good discussion on a potentially very important issue.

My understanding - and those experienced with aeration can chime in - is that by moving the diffuser up to a shallower level, the coldest surface water is not circulated to the deepest part of the water column stealing that all important warmer layer that allows the fish to survive.

Many here leave their aeration running through the winter, but typically only after raising their diffusers to the top 1/3 of the water column or even shallower. I believe it is typically done to keep open water for purposes of allowing sunlight into the water for photosynthesis to continue.