I have too been fighting what I think is Mustard Algae. My pool water is very clear but in areas i am getting streaks of yellow and sometime a cloudy film on the bottom. It is not slimy but keeps reoccurring and doesn't affect the water clarity. I jacked my FC up to 20-22 ppm as my cya is 70. The chlorine level is holding over night and was before. I think this is mustard algae or could it be pollen, anyways i am on my 2 day of keeping th FC above 20. I am going to do it for a few more days due to it being crappy rainy here in West Virginia.

I wish I would have taken some pics. If the crap comes back I will take some pics and post

Mike....GO MOUNTAINEERS!