"David W.E. Roberts" wrote in message
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"Franz Heymann" wrote in message
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"Eshymouse" wrote in message
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Hello
snip
Any help gratefully received.

Just break the ice regularly so as to expose some of the surface of the
water to the air.

Franz

Don't break the ice - the shock waves could kill them.
I did a similar dumb thing and stunned a number of our fish - and I should
know better as I was once a Marine Biologist.
Hi-tech way is to get a pond heater - just a small heater which floats in
a
foam collar - which keeps an area clear of ice.
Lo-tech way is a bucket of hot water to melt a hole in the ice now and
then.

Cheers
Dave (fish killer) R

Or a couple of ping pong balls floating on the surface.
If it freezes, pull one of the balls out/pour warm water on one.

This releases any trapped gas under the ice which causes lots of problems to
fish.

Dave