Split off of this topic. JasonLion
I am newbie here and not trying to highjack this tread but have recently came across the same issue with my pool surface in the last few weeks. I am trying to stop it in it's tracks before it gets out of hand. Can you provide any update on how you treated this? Is a metal brush or pumice stone better? Did you use any additional chemicals on the surface when treating this other than keeping you balance under control? My finish is white plaster.
I am expecting my TF-100 Kit to arrive in the next few days and will post my results then but wondering what else, if anything I can do to bring this under control?
Thanks in advance.