IMHO, if you only have FA a few feet out around the bank and the rest of the pond stays as open as it looks in the pic. I would not do anything.
Manual removed is an endless battle and will start to feel like a waste of time I suspect.
I second Bobby's idea.
The one place I have found manual removal or even just pushing it down into deep water is to aid fishing. I spent a couple hours cleaning patches along the shore of our 3 acre pond and it made fishing much easier. Just cleaned up the areas we wanted to fish from and they appear to be staying open till new growth takes over which might be a few weeks. Worth the effort to not pull muck off hooks all the time.
