I have to smile about what plants are best for a pond. Things constantly change. The reaction to every action thing is constantly taking place. Plant bog plants and the water goes down and that hard work and expense is down the drain. Plant some eel grass and then put in some grass carp and in my experience there goes the grass. Then when it gets really out of hand, chemically zap it and start all over again. So the fun is enjoying the journey to what ever you seek in your perfect pond.