Hadn't noticed this thread till now. ML mentioned that his FA seems to dissappear after rain. I assume he's talking about the floating stuff. Someone explained that FA grows on stuff in the pond and then floats when gas bubbles accumulate in the slimy stuff. Look close and you can see bubbles all over in it. A good rain will beat the air out of it and it sinks. Still there but on the bottom. I also think Looptech should try manual removal. I use a method that your pond looks perfect for. Get some floating rope, I got mine from a mail order surplus dealer. Stretch it across the pond (will take two people) and very slowly drag it accross the surface until you get it all into one corner. Now you need a third guy to start raking or scooping the stuff out. In an hour I can clean up a pond the size of what I see in your picture. One pass will get 50 to 75 percent of the stuff once you get the hang of it. I use a smelt net to scoop the stuff out rather than a rake. FA is just to fine for a rake.
