Just looking for an ID on these two and a good chemical control method. I'm guessing the slender leafed one is horned pondweed or sago pondweed, but I have no idea about the other.
Almost all leafy plant's such as yours grass carp would love to have a buffet on. My state requires a permitt but it is very easy to get. I had a problem 2 yrs ago with pond weed and 6 grass carp in my 1/4 acre pond took care of it. this year I have next to none. I am sure cutrine and such chemicals would work but I do not like to put them in my pond.