Water Gardening: Winter Protection for Ponds through severe ice freezes..., 1 by adavisus

adavisus wrote:
Perhaps folk can add their experiences as 'what works' for their pond, when protecting them from snow and ice...

Here's a diagram of a low cost effective way to vent ice I've used quite effectively on several occasions, using the layer of ice and snow to act as a layer to keep sub zero air from getting to the pond surface, while maintaining a reliable vent to keep toxic gases from building up below the ice

Quite effective in the event power failures affect heating elements or pumps... While deep drifting snow would close over such a vent arrangement, it sure would be reliable where snow is not deep or drifting

Regards, andy