Green cloudy pool.......

Algae problems in swimming pool water.
Green (cloudy) water or slimy pool walls.
Black algae. Mustard algae. Pink or white pool mold.
chem geek
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Location: San Rafael, California

Re: Green cloudy pool.......

Postby chem geek » Tue 23 Aug, 2016 06:36

The active chlorine (hypochlorous acid) level that is proportional to the FC/CYA ratio is what kills algae. So using Trichlor pucks builds up CYA over time so the chlorine becomes less and less effective. That's why once you started to have algae growth you couldn't get rid of it with normal chlorine levels. You need to SLAM the pool but probably should lower the CYA level by water dilution first.

You may very well get unusual chlorine demand, dull/cloudy water, and visible algae growth again because you have not managed your Cyanuric Acid (CYA) level. Your temporary elevation of the chlorine level is a band-aid fix that doesn't resolve the fundamental problem of CYA buildup.



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