Hello all!
New pool owner here - trying to figure it out.
I noticed over the last 2 to 3 weeks that the bottom and sides of the pool have developed these circular clear/white “lesions.” Upon closer inspection, it almost looks like the concrete surface is eroding? I took a pool sample to the local store: pH normal, free chlorine a bit high at 5 ppm, calcium low (180), total alk low (55), phos high (3000), the rest normal.
Local pool store guy did not know what the problem was, recommended correcting the calcium and observing.
I have pictures, but can’t figure out how to attach them to this post
Any thoughts?
Circular lesions on pool surface
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- I'm new here
- Posts: 1
- Joined: Sun 29 Aug, 2021 09:45
- My Pool: 21,000 Gallons
Concrete
DE filter
Built in the 1970s
Not heated
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- Pool Industry Leader
- Posts: 2594
- Joined: Tue 06 Sep, 2011 05:48
- 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: Circular lesions on pool surface
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