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    Black Algae in Vinyl Liner

    The normal means of chlorination is a floater with tri-chlor sticks and dumping granular chlorine in the pool. But every week when I return to the pool the chlorine is down to .5ppm or less. For that reason I feel confident that the CYA number is correct.
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    Black Algae in Vinyl Liner

    it has been spreading up the side of the wall in the deep end
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    Black Algae in Vinyl Liner

    I have a taylor k-2005 kit ph-7.4 tc- 2.0 fc-2.0 cc- 0.0 cya - <30 alk-50 calcium hardness- 240
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    Black Algae in Vinyl Liner

    Hi! I have a vinyl pool that appears to be showing signs of black algae, I have read some topics relating to black algae but it seems most of the cases involve a gunite pool. Is my best option still to shock and brush or are the soft bristles of the vinyl liner brush not going to be effective...