My pond is nearing 9 years old and is now loaded with bunches of the attached plant(s). This started last year and this year it is now an issue. It has grown along the shoreline and now mats on top. The primary plant is long, with very slim 'leaves' if you can even call them that. It has a very distinctive berry cluster that is smaller than a tic-tac and looks like a small bunch of grapes. The second weed is found with the first, but is much less of an issue. It has truer 'leaves'.
I appreciate your help identifying the plants and a mechanism to kill them. I stock trout during the winter (staring in 3 weeks, so that is a consideration in the method used).
The pictures attached are: - The pond surface with the plant matting - The troublesome plant with the berry noticeable - The troublesome plant jar photo (berry visible if you look) - The second plant - The second plant jar photo