so I have a little duck pond and recently there has been some hot weather. There was always some algae on the liner of the pond but today there was algae floating on the surface, my filter was clogged with algae, and the whole side of the pond what covered in stringy algae! I put in some algicide every week, and it works, but right after the existing algae is killed, new algae grows. My ducks also poop a lot so, the water is nitrogen-rich. Is there some way to deal with it? Fish? Thanks