Regarding the small black slimy particles.
I do not have any vegetation overhanging the pool.

Also these small black slimy particles are way too big to be caterpillar poop.
Many of these small black slimy particles are shaped like teardrops not small spots.

That's why I asked about dirt as maybe the cause of the small black slimy particles.

Quote:
Green slime is caused by algae . . . which results from inadequate chlorination.

I think you are right. I will study your answer regarding the green slime.

But regarding the small black slimy particles.
I am still in the dark.
Do you have any other thoughts about the small black slimy particles