yellow

Please help. I believe I have yellow algea. I've treated my pool twice this week without success. The first treatment I used Yellow, chlorine after 5 minutes, at 12 hours and 24 hours, vacuumed to waste and backwashed filter. It was back the next morning. Then I used algeacide and shocked and...

Hi all. I started a SLAM 48+ hours ago because I noticed what I thought was yellow colored algae in various spots around the pool. It doesn't seem to be disappearing and I can't rub it away with my finger with vigorous scrubbing so could these spots be some sort of stain in the plaster? And if...