Usually we have to deal w/ Ice a lot.
Notice all the fish dumped into that pond.
It's 3.5 feet deep at the far end and so they are fine in there.
Ice usually gets about 6" deep or so.
The fish will be thinned out to our 4 other shallower ponds in a month or so.
Carp (Shibunkin, Koi, Comets, etc) activity is determined by water temperature.
Between 45-50° they quit feeding.
Below 40° they basically stop moving and you may not even see their gills working.
They can take down to 33°.
The holes you try to keep open in the ice are allow toxic gases to escape.
Very little O² gets in thru there.
The fish (usually Goldfish) head there for warmer and fresher water.
We run a pump all winter but don't use the water falls or brook.
The hose is just below the surface, stirs the water and stops ice from forming.
