I have two brown stains the size of leaves and two smaller brown stains at the deep end of the pool. At the suggestion of the Leslie Pool Store, I rubbed them with a puck, leaving some material on the surface to bleach the stain. After a half hour, the puck material was gone, but not the stains. I rubbed the stains again, and came back an hour later. Still no change.
Is rubbing the puck on the stain effective for organic stains? If not, what should I be doing? If so, then I presume they are metal stains. How do I treat those?