black alge

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black alge

Postby evertboyer » Mon 05 Oct, 2020 10:32

I have black spot in my pool, I think is black alge how do I treat this problem. thank you for any suggestions.

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My Pool: 10k inground fibreglass, Telescopic Cover, Hayward Powerline pump, Quality filter with glass media, 27kw output heat pump, K-2006C test kit
Location: United Kingdom

Re: black alge

Postby Denniswiseman » Mon 05 Oct, 2020 12:23

Test with Vitamin C (ascorbic acid) and a chlorine puck to determine what it is (Separately)

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