I've had this pool for 6 years, and this is the first time this has come up. I vacuum my pool and check the chemistry every week.
For the past two months there's been this dirt looking stain in my pool. Which has actually caused me to vacuum it twice a week since it looks really bad. I tried googling around to see if I could see what this could be. I don't think it's pollen, because pollen floats? So I'm guessing it's dirt?
I brush the pool before I vacuum, and i'm able to get all of the dirt when i'm done cleaning. But it keeps coming back every 3-5 days. Is there any way to prevent this? I don't have a time lapse camera to record whats going on. Maybe a squirrell is digging up the dirt in my planters? This is the first time this has happens in my 6 years of owning this pool, so I don't know what's causing this.
Here are some pics (those darker spots are leaves)