heron didn't bother us much last couple years , as i recall , but ate some really nice comets a week ago . we netted pond for years but not last couple because of lack of heron sightings . would like to protect our fish again but preferably without netting . several years ago i read about someone having a little '''shelter'' in the bottom of pond which fish could get under for protection . do you think that would help save our fish , and is there some ''object'' that would work as a shelter . i wondered about a waste basket laid on its side but don't know if something with access from all four sides would be better . any thoughts on deterring the heron welcome and appreciated . i'd like to put a sheet of clear plastic about three inches under the water for a couple weeks to see if heron would take a '' whack'' at fish and end up with a sore beak and a head ache , wife says no . thanks for your time . . .peace