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Thread: Trying to increase my CYA

  1. Back To Top    #1

    Join Date
    Feb 2012
    Location
    San Jose, CA
    Posts
    76

    Trying to increase my CYA

    The essentials:

    FC 3
    CC 0
    CYA 5-10
    pH 7.8 (just added a gallon of 14.5% muriatic acid, which should lower this considerably)
    TA 230
    CH 160

    I've added about 90% of a 4 lb tin of CYA powder, and my CYA barely moved even after about 2 weeks! I put it in the skimmer, but didn't use a sock. There are two holes underneath the skimmer basket plate - to vacuum, our PB said to cover the left one with a tennis ball and hook a vacuum hose up to the right hole. Could it be that the CYA powder went down the wrong hole, and is just hanging out down there (or worse, clogging something up)?

    Edit: I just realized that 1 lb is 16 oz, not 32 oz. Whoops! Looks like things are ok then, if my CYA level is at 10 after 50 oz of CYA powder. Could someone still explain what the two holes underneath the skimmer are for? Thanks!
    Filled 5/1/2013! 36k gallon 20x40 IG with 7x7 spa, FinestFinish, AquaMatic cover, All Pentair: Clean&Clear 520 sqft cartridge filter, Intelliflow 4x160 variable speed pump, 2 HP whisper flow spa jet pump, 400k BTU MasterTemp heater, Letro Platinum pool cleaner, Rainbow 320 chlorine feeder, Pac Fab Bermuda skimmer
    More details: pics-new-pb-20x40-ig-gunite-7x7-spa-7x7-shamu-shelf-t54952.html

  2. Back To Top    #2
    techguy's Avatar
    Join Date
    Jul 2010
    Location
    Antelope, CA
    Posts
    2,687

    Re: Trying to increase my CYA

    Have you back washed the filter since you added the CYA?
    -- Guy --
    10K gallons in 21' Round 52 inch wall Aqualeader AG, Hayward Power Flow LX 1.5 HP pump motor, Hayward Perflex EC50AC DE filter w/Cellulose, Wide mouth skimmer, 2013 new Diver Dan (craigslist) to replace the faded old Hayward AquaBug. TF-100

  3. Back To Top    #3

    Join Date
    Feb 2012
    Location
    San Jose, CA
    Posts
    76

    Re: Trying to increase my CYA

    Nope.
    Filled 5/1/2013! 36k gallon 20x40 IG with 7x7 spa, FinestFinish, AquaMatic cover, All Pentair: Clean&Clear 520 sqft cartridge filter, Intelliflow 4x160 variable speed pump, 2 HP whisper flow spa jet pump, 400k BTU MasterTemp heater, Letro Platinum pool cleaner, Rainbow 320 chlorine feeder, Pac Fab Bermuda skimmer
    More details: pics-new-pb-20x40-ig-gunite-7x7-spa-7x7-shamu-shelf-t54952.html

  4. Back To Top    #4
    frustratedpoolmom's Avatar
    Join Date
    May 2007
    Location
    SWSuburban Chicago, IL
    Posts
    11,965

    Re: Trying to increase my CYA

    The other hole is probably connected to your main drain but normally that's already plugged.
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
    http://www.PerfectlyClearPoolService.com

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