It’s not all over, but we have a number of spots in different areas on the bottom. And one of the curved walls looks yellow. But we aren’t really seeing rust, so maybe it’s not metals. I tried an algaecide, but not specifically for mustard algae. And there is an area on the liner above the water line (see photo). Do you think it’s probably mustard algae?
Ask the Pool Guy Changed status to publish July 19, 2019
If the stainfree lifts the stain, then it is indeed metals – treat accordingly!
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Ask the Pool Guy Changed status to publish July 19, 2019