I am getting some green pea soup in my pond. Not thick but there is enough to prevent me from seeing very deep into the pond. The thing that is frustrating is that I just applied cutrine at .6 gallons per acre ft well diluted and distributed 7 days ago. How could this reappear so soon? We did recieve a heavy rainfall since the treatment but It came back so soon. I know the rain brought in some nutrient but shouldn't the plankton be dead? Should I treat it again or will the plankton die off by itself? Thanks