Okay, I have had an issue with algae for about a month now. I balanced my pool and added 8 pounds of CYA last week (it was showing 0). Now this week my CYA still registers 0, FC is 0 and TC is 0 and my other levels are fine (PH 7.2, ALK 80). My water is crystal clear but, I have brownish sandy gunk in the bottom and along the walls.
I am assuming this is the algae still living because after I brush it comes back maybe three or four days later in almost the same spots on the wall. I read another post thinking it may be dirt, but it returns in the same places. I already used Leslie's Algae Control to treat about 3 or 4 weeks ago and I put about 12 oz of Leslie's Algae Control every Sunday for prevention, but something is not right. Though the pool looks well, this chemical level and algae/dirt business is really irksome. Any help is appreciated.