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Re: NFC: DP Frozen pond question
Issue is not keeping a hole in the ice open, rather, to ensure that
there is enough gas exchange so that sufficient oxygen levels are
maintained. For ponds which have a stream component, it is not a problem
as water in the stream can undergo gas exchange. Problem comes when
there is no inflow/outflow and ice seals off access to atmospheric air,
leading to rapid oxygen depletion, especially in shallow ponds.
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>That will work well for mild ice but here around Buffalo, once the ice
reaches
>2 inches thick the airstone methood willnot keep a hole open in the
ice.
>
>Bill
>
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