WHite lines on surface

What is floc, clarifier, stabilizer, cyanuric acid,
algaecide, brightener, dichlor, sodium hypo,
sodium bisulfate, ....??

WHite lines on surface

Postby Pgard » Thu 04 Oct, 2007 17:37

I am seeing a couple of white lines on the side of the pool under the water, it feels hard and when brushed it has a powdery residue in the water. All chemicals test great, any ideas

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Postby Walter » Mon 08 Oct, 2007 08:51

It sounds like it is Calcium buildup
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Postby mr_clean » Mon 08 Oct, 2007 13:58

what is CH level of water?
you can take sample of pool water to pool store and have them test it.
CH should be 150-350. If higher you could have calcium buildup on tile or around water line. Keeping PH at 7.2 - 7.5 & TA 80-120 and using sequestering agent/metal remover should help stop it after brushing and removing it if possible. After finding out why it is happening if you can not remove it, there are pool tile guys who can bead blast it off.

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