Anyway I've been reading up on MA and have a question by what people are defining "wall" as? I had some yellow/green stuff on the slops of my pool, but it ended right at the crease where the actually 90 degree wall begins and not much on the bottom either. Whenever my filter is newly charged (and it was) the returns really push and I also get slit accumulation on this same slope below the returns. I also don't get a much settling in my deep end as my one return is pointed right down there and always churns that area up.
These facts also lead me to believe it is probably pollen. It was on the sunny side of the pool, which would be odd, but not impossible for MA. Also it showed up around the time of a huge wind storm (again this points towards pollen as well). I know it is a little late for tons of pollen, but we have an American Linden/Basswood tree in the front yard that just flowered around the same time. Also my pool only loses 2ppm or so a day and my CC have been .5 or less, though I know MA may not lower FC or increase CC bellow mustard shock levels.
What do you guys think.