I am still considering myself a newbie, although with the help of this forum I have been taking care of the pool by myself for the second season. My question:
Every week -10 days I see a mustard/green film on the pool walls, mainly in the deep end. It brushes off easily (creates a cloud when brushed). I used the "maintenance" dosage of algaecide occasionally and I do not think I saw any difference.
Is it algae or just dirt? What should I do? The water is pretty balanced, with PH currently at 7.8, as it tends to drift up every couple of weeks.