I put in 10 12"+ grass carp in my 2 acre pond last weekend. I have bushy pondweed about 15 feet out from the shore all the way around the pond. I have looked into to putting chemicals in it, but i im hesitant because i have had a bad experience with them. Will the grass carp eat up some of the pondweed this season or do i have to wait for it to die this winter and the carp control it from there on next season? I really want to fish this summer.