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Thread: CYA & Chlorine

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    IMXTREEM2's Avatar
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    Jun 2010
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    CYA & Chlorine

    Split from here: cya-chlorine-t37065.html
    It is always best to start your own thread when you have a question. Butterfly



    Guys,

    I'm having a similar issue with CYA. Although it was very high last year when we bought our house (May 2010), we went through the first summer on the BBB method and over time brought our CYA down to a desireable level. After the pool opening refill back in May 2011, large amounts of rainfall, and some refilling with the hose due to evaporation in the hot summer (plus normal splashout and a pesky drip now and again from the filter), the CYA now seems to be down somewhere below 20 (as tested by my TF-100 kit a few days ago. There's literally no amount of liquid that I add to that test tube that made the black dot fade out of sight). Granted it's been quite hot here in Chicago for the last few weeks, yesterday after work I added 2 of the "large" bottles of bleach from Wal-Mart and tested my FC in the morning. At that point, I was at about 11 or so (FC). After I got home from work today, I tested again and it was at MAYBE .5 (FC) if not 0. Under this, I'm spending $5/day on bleach and it's still not cutting it. I can only assume I need to raise my CYA, correct? Assuming my other levels are in check, what's the best way to approach this and, to what level should I bring it?
    Rich

    27' Round Johnny Weissmuller Legend Above Ground Pool
    Capacity: 17,200 Gallons
    Water Depth: 44"
    Filter: Hayward XStream Full-Flo, 150 Sq. Ft.
    Filter Type: Cartridge
    Pump: Hayward PowerFlo Matrix 1.5HP, Single Speed


    Season 3 of Jug Dumping started May 2013!
    _________________

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    frogabog's Avatar
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    Re: CYA & Chlorine

    Try adding 20ppm of CYA to the pool (HTH from walmart dissolves quite fast) in a sock hung by the return. Squish it frequently.

    Without knowing your current level, adding 20 shouldn't put you above 40, and it should also give you enough to be able to test a registerable value for CYA. If you're still under 40 then, add more CYA to get to 40.

    You can try to test for CYA within a few days after the sock is empty. Some of us have had accurate results the next day with the HTH stabilizer. YMMV as always, and testing a week after adding CYA is the standard recommendation.
    Where kids swim in 54 degree water, turn blue, and giggle happily cuz they got a POOL!
    Year 3 BBB -15' x 48" Intex Metal Frame - Was using (2) 1000gph Intex cartridge filters (see Full time pumping Intex). 2012, converted to 1600gph and sand filter+SWG = Sand filter love affair!
    Don't waste time and energy looking for a better value on test kits, the TF100 is the best deal around. I did the looking and spent the extra money, but you don't have to make the same mistake. Just go here: TFTestkits. I use Pool Calculator for min/max, and shocking chlorine levels.

  3. Back To Top    #3
    IMXTREEM2's Avatar
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    Jun 2010
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    Plainfield, IL
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    Re: CYA & Chlorine

    Thanks frogabog! I'll give that a shot this weekend!
    Rich

    27' Round Johnny Weissmuller Legend Above Ground Pool
    Capacity: 17,200 Gallons
    Water Depth: 44"
    Filter: Hayward XStream Full-Flo, 150 Sq. Ft.
    Filter Type: Cartridge
    Pump: Hayward PowerFlo Matrix 1.5HP, Single Speed


    Season 3 of Jug Dumping started May 2013!
    _________________

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