So when I opened my pool in May 1, I noticed organic stains from acorns trees in my neighbor's yard and treated using The OS Spot Stain remover and Muriatic Acid (works great! See attached pictures). However, as I treated the stains spot, I started to notice that those spots now looks whiter than the rest of the pool plaster (see attached pictures, which shows my plaster with no stains. However, the picture does not show the whiter acid treated spots). I have two theories as follows:
Theory 1: When my pool was built 2 years ago, the pavers dust got to the water in slightly stains my plaster to a level I could not notice until the acid removed the organic stain and the paver dust stains.
Theory 2: The stains was is normal aging stains and the acid is making the treated spot brighter/whiter.
Regardless of what happened. Now I have clearly visible whiter/brighter spots (where stain were treated). Is there anything I can do to restore the whiter/righter plaster of my pool to match the stained treated spot?