Jon Cranfield

the pond frozen this morning

In Observations on November 25, 2010 at 6:07 pm

The pond has had its first freeze this morning. The usual advice is to make a hole in the ice. The idea around this advice is to try and get toxic gases out and oxygen into the water to prevent fish & amphibian deaths.

Pond conservation ran a survey this year which looked at the effectiveness of making a hole in the ice. There was no difference in amphibian or fish deaths between garden ponds which were left iced and ones which had holes placed into the iced pond. In fact ponds which were deep tended to be more dangerous to wildlife during freezing episiodes due to the build up of rotting sediment.

More to follow

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