nkk329951701 Posted June 27, 2009 Report Posted June 27, 2009 We have some nasty stains at the bottom of our above ground swimming pool, I talked to Pinch-a-penny and they told me that all my levels were great and to dump 6 1/2 gallons of chlorine in the pool well the stains lifted but two days later they came right back, the color of them are light brownish/blackish color. They said that black algae can't grow in above ground pools. So I just don't know what it is... Quote
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