I have an old pond that I am trying to clean up and stock. There is already a handfull of fish in it and plenty of forage. (Frogs,salamanders, minnows, water bugs). The pond is about 1/3 acre and 7 feet at the deepest point. The problem is the stuff in the pic makes it nearly impossible to fish. I will be installing an aeration system soon and treating with Aquashade, but what else would help get rid of this stuff?