Duckweed and pond weed
I'm starting to get duckweed and pond weed in my pond. I tried chemicals but ended up in a big cycle of endlessly having to add one thing after another without ever really getting rid of them. I tried ducks but the pond was too small really and they caused too much damage to the marginal plants. I then tried fish - they ate it very reliably but also devoured any invertebrate or amphibian life until a heron, in turn, ate them. Anyone have any suggestions please?