What aquatic and semi aquatic plants would you recommend to plant in and around the edge of a pond in order to help clean and filter the water?

Question: We have two ducks and to keep them happy and healthy, this winter I dug out a small pond for them. The pond is approximately 10′ by 18′ with varying depths of 12 to 30+ inches. It’s in a naturally low lying area that tends to be wet for a good part of the read more What aquatic and semi aquatic plants would you recommend to plant in and around the edge of a pond in order to help clean and filter the water?