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Thread: How much Acid?

  1. Back To Top    #1

    Join Date
    Feb 2009
    North East Thailand

    How much Acid?

    Hello Folks
    Test results: -
    FC 16
    CC 0
    TC 16
    pH 7.2
    T/A 210
    CH 350
    CYA 100 or more!

    I have a 78000 liter pool, In ground, Tiled, Sand Filter,2kw Pump

    I need to lower the CYA levels and have at last been able to buy Hydrochloric Acid as advised, how many liters should I use and how often?

    Thanks for all your previous help
    Mike Court
    In ground Pool size 12m x 5m x 1.3m av
    Concrete construction with tiled base and sides
    750 Sand Filter
    1.5k Pump
    I don't have a skimmer, around the perimeter of the pool is a plastic grate above a concrete channel that directs overflow into holding tank.

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: How much Acid?

    The only practical way to lower CYA is to replace water. It would be best if you took care of that before thinking about the acid.

    Your primary need for acid is going to be because of your very high TA level. You should read Lowering Total Alkalinity at Pool School for instructions.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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