As a duck keeper who constantly tries to give our animals the best possible life, it is sad to see the unnecessary loss of birds.
Usually this is the result of unbalanced eco-systems. The body of water was designed for human pleasure rather than a coherent eco-system. Then the first go-to was chemical treatment.
We at Two Hounds Farm are on the slow upward climb to a coherently designed eco-system. Today we were painting IBC tanks black. The combination of low light and high temp keeps the water really clean – no algae or other growths, no chemicals needed.