New to forum.
I don't see a lot about black algae but I did see something that was saying not to use black algae killer. I have a pool service. He says he has kept the chlorine levels up but the black algae is spreading. I was going to get a product and he said he would add it and scrub the algae with a metal brush. Now what I'm reading here makes me wonder what the right treatment is.
Please let me know. Sorry if this is already here, I don't have time to go through every post.