Severe black algae stains

Stains on the pool surfaces, pool equipment
or on the swimmers, or off-color swimming pool
water. Discolored but clear pool water.
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tholius
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Joined: Fri 17 Aug, 2018 13:14
My Pool: Many pools, I flip homes

Severe black algae stains

Postby tholius » Fri 17 Aug, 2018 13:22

I am flipping a home in Phoenix, the pool was left 1/3 full for many months. I drained and *gently* pressure washed the plaster, to see if it was dirt or black algae. The plaster is deeply stained. Will an acid wash clear it up or do I need to re-plaster? Thanks so much for any advice.
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Teapot
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Pool Industry Leader
Posts: 1337
Joined: Tue 17 Oct, 2017 10:52
My Pool: 12 x 24 (45m3) liner pool, Triton TR60 filter with AFM glass media (Activate) and variable speed pump running 0.08HP
Location: UK

Re: Severe black algae stains

Postby Teapot » Fri 17 Aug, 2018 14:16

I would try the acid wash first and clean/sanitise with chlorine dioxide.
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