I left for a fishing trip Thursday afternoon and the pond still had azolla covering almost the whole top. We came home Sunday afternoon and there is no azolla in sight anywhere. It all must have died and sunk. I have had my aeration system running 24/7 since I started trying to kill this stuff. I havent seen any dead fish. Now all I have is a little FA to take care of. I will post pics when I get to take some.