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Thread: 10% liquid chlorine raising pool 0 FC

  1. Back To Top    #1

    Join Date
    Sep 2013
    Location
    Nazareth, PA
    Posts
    10

    10% liquid chlorine raising pool 0 FC

    I'm a little stumped by this one. I did my full test yesterday and my numbers were:

    FC: 1
    CC:0
    CYA: 30
    PH: 7.5
    TA:50
    Borate: 30
    Salt: 2380

    I added about half a gallon of 10% liquid chlorine that I got from Walmart on sale for 2.50. I checked this morning with the quick test and I have 0 FC. I added another half gallon and waited a couple hrs and still show 0 on both the full TF100 and Taylor test. Is is possible that this stuff is just totally bad? I can't believe it's providing no chlorine to the pool.


    12,500k AG 24ft Round
    Hayward EC-40 DE Filter
    1HP Power Flo LX

  2. Back To Top    #2
    Texas Splash's Avatar
    Join Date
    Jun 2014
    Location
    South-Central Texas, Marion/San Antonio
    Posts
    12,982

    Re: 10% liquid chlorine raising pool 0 FC

    Could the bleach be bad (weak) - sure. But based on your exceptionally low FC level, I'm willing to bet you have the beginning of algae in the water (even if you can't see it yet) which is consuming that very little amount of bleach you are adding now. I would prepare for a SLAM (link below) by lowering your pH to about 7.2. Then I would recommend taking your FC to the SLAM level of 12, then test is about 15-20 minutes later. Increase again as needed until you are confident it is beginning to hold and maintain the FC of 12 daily until you pass the 3 SLAM criteria. Hope that helps.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
    Vital Links: POOL SCHOOL, RECOMMENDED LEVELS, RECOMMENDED CHEMICALS, Poolmath Calculator, SLAM, Chlorine/CYA CHART.
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