Kelly, Im with you I dont think dead fish would find there way to the 20 ft hole during the winter. So upon thaw they will either be floating on the edge or have sunk.
Is there testing labs that are used for checking for pond water problems (clarity) that could advise based on fact and not speculation?? I know that there is a wards lab nearby that tested our soil core samples before pond construction.
I monitored the pond closely after I found the fish sucking for air till the time the pump was installed and I dont believe we lost any at that time. As soon as the sun would come up they would seem fine again, it was just at day break after no sun for several hours.
Are you speaking of some sort of net? Can these be purchased at cabelas?? Thanks