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Thread: Help with no CYA & low FC

  1. Back To Top    #1

    Join Date
    Jun 2012
    Orwigsburg, PA

    Help with no CYA & low FC

    Hello All,
    First time using my test kit (and life-saver Spinner!) and I am not registering any CYA and an FC of 0.5.
    My water temp is 55*F, so SWG not running. Have had Stabilizer in sock in skimmers for 4 days after vacuuming and backwash. My question is: Do I manually add liquid bleach, assuming I have some amount of CYA that is not registering? Without knowing my true CYA, how much chlorine should I add? We are expecting a nor' easter tonight for the next couple days so my numbers most likely will change when I check them after storm. Should I wait until after the storm to do anything?
    My water is clear.
    Thanks in advance for the help-and for the suggestions on this site to purchase the test kits from TFTestkits. Kits came quick with easy to follow directions. Felt like Beaker from the Muppets all morning!
    Salt: 4200ppm
    FC (by the FAS-DPD test):0.5
    CC: 0
    CYA: 0
    PH: 7.8
    Calcium: 375
    28K IG Vinyl Freeform with Spa waterfall
    SWG, DE Filter
    Pentair Intelliflo VS Pump, Dolphin D4 Sweeper
    Install 2010
    TF 100 Test Kit & NaCl test kit

  2. Back To Top    #2
    Richard320's Avatar
    Join Date
    Jan 2010
    San Dimas, CA (LA County)

    Re: Help with no CYA & low FC

    Yes, add bleach. With no CYA, target 5 FC.

    Your pH is at the upper limit and you have high TA. Expect the pH to climb a lot with the rain. When the surface gets pelted with rain so that it looks like it's boiling, that's aeration. I'd add a little acid to bring it down before then.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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