Hey there y'all! New to having a pool this year and have been dealing with brownish yellow dust for the past month or so. I have used Yellow Out and done the full cycle and Green to Clean and done the full cycle and am still dealing with the same issue. There is a fine yellow brown dust coating the entire bottom of my pool, no halos or spots, just solid coating. If I vacuum daily with the skimmer sock on the vacuum I can get it all up, but then it immediately starts to come back. It gets on the side where there are creases in the vinyl (we are renting or I would have already replaced the liner because it desperately needs it, loads of creases on the sides and bottom). I cannot get a pool professional to come out to save my life. I have no problem paying a pro to teach me, there are just no pros available. If I just brush the sides and walls instead of vacuuming it suspends in the water and turns the water green. If I just brush a particular spot it stays clear for a bit then starts getting a layer again just lighter, you can clearly see the line where it was moved. The whole pool is in direct sunlight the majority of the day. I just got a Taylor 2006 kit and have been testing this past week. I started SLAMMING the pool last night. TA- 100 PH-7.2 CYA-40 is where I started. I am keeping it at the 16ppm level for the SLAM. My question is could this be Pollen or Farm Dust instead of Mustard Algae and how do I tell? When I was previously shocking the pool the dust was still there (I didn't get the levels to SLAM levels though) There is constantly pollen floating on the top and my allergies have been killing me. Our fence is about 3 feet from the pool and is more a cattle fence then a privacy fence. Right behind the fence is a huge pasture land. There are about 15-20 cattle that roam out there daily. They will come right up to the fence to munch on grass often. We also have a large tree right outside the fence that they like to chill under. None of the pictures I've seen of Mustard Algae looks like what we have but I've also never seen pollen look like this. I just recently saw posts about farm dust and am not sure if maybe that's the case! Help please.