The balls camouflage the water surface from waterfowl which prevents unwanted birds from using or contaminating the water. Berms are cleaner as there are no geese droppings around the pond and no droppings will eliminate a potential additional ammonia load.
Many respected biologists have described the ECC bird deterrent ball cover as self cleaning. Bacteria, and other vegetation will not grow on the ECC balls due to the continuous motion of the balls on the surface of the water. This is also another advantage of eliminating waterfowl. If the waterfowl has nothing to eat on the cover they will move on to another area.
The balls also inhibit the formation of foam on the water surface.
The ball cover eliminates odors as it covers 91% of the open surface that holds odors in the waste lagoons.