Moved from here.
I have these little black spots in my inground pool as well. They don't scrape off at all but have responded to getting smaller when I chalk them with a chlorine tab. not sure what they are either.
I have these little black spots in my inground pool as well. They don't scrape off at all but have responded to getting smaller when I chalk them with a chlorine tab. not sure what they are either.
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