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Thread: Is a Pool Chlorine Level Above 10 PPM Unsafe?

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  1. 05-24-2012 12:16 AM #1
    han78216
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    Default Is a Pool Chlorine Level Above 10 PPM Unsafe?

    Admin note: this is a copy of the first 4 posts of this thread:
    http://www.poolforum.com/pf2/showthread.php?15974


    Hello everyone. I recently moved to a new house with a pool and I have been reading up this forum and started using BBB method.

    The pool, in-ground 25k gallon, water is pretty clear now, but I still get algae on the wall even though I keep chlorine level at above 5ppm all the time.

    I recently got the testing kid everyone is recommending and found that CYA is somewhere between 240-300. I had to dilute the water twice. and ph level is 7.5.

    Is having CYA@240 the cause of my algae problem? How much water should I replace in order to bring it down to the acceptable level? say 50?
    Last edited by Orca; 08-19-2013 at 05:20 PM. Reason: clarify title
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