Put some Vitamin C tabs on the steps, to rule out iron. If Vit. C clears the area around the tab, it IS an iron stain. If not, it may be chlorine oxidation, which is probably permanent.
Re: Yellow stain on steps from chlorine tablets
Put some Vitamin C tabs on the steps, to rule out iron. If Vit. C clears the area around the tab, it IS an iron stain. If not, it may be chlorine oxidation, which is probably permanent.
PoolDoc / Ben
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