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Thread: Numbers and Questions

  1. Back To Top    #1
    esim13's Avatar
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    Numbers and Questions

    Today's numbers are:
    FC 1
    CC 0
    pH 7.6
    TA 110
    CH 130
    CYA 50 or 60

    I was out of town for the weekend so I didn't get a chance to pick up some more bleach. That will be taken care of tomorrow. I've added the muratic acid suggested by pool calculator. Here are my questions..
    1. Should I continue to lower pH to help with TA?
    2. With such a large range on CH, when should I worry about adding Calcium Chloride?
    3. When testing CYA, should the dot totally disappear or just be barely visible?

    Crystal clear and lovin it!! THANK YOU TFP!!
    10,408 gallon, 21' round, 52 in' deep AG, half in ground
    Artesian Clear Master Plus Sand Filter, Artesian Turbo King 2 hp pump, installed June 08
    Denham Springs, Louisiana
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    frustratedpoolmom's Avatar
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    Re: Numbers and Questions

    Your PH, TA and CH are just fine (CH isn't very important in a vinyl pool.
    The dot should totally disappear.
    Understand that the "Min" for your CYA level means NEVER letting it go below that "min". You need to "target" the higher number each night to keep it above the "min" at all times. Letting it drop that low opens the door for organics to take hold. Anyway you can get some bleach in there this evening?
    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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    Mod Squad zea3's Avatar
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    Re: Numbers and Questions

    Edit: Somewhat repeating what FPM said because I took so darn long to type all this up!
    1. I think your TA is fine at 110, but you could lower it to around 90 if you want. Just make sure you don't drop the pH too low while doing it.
    2. With the vinyl liner you don't have to worry about calcium being leached from pool surfaces. Plaster pools are vulnerable when the calcium level gets too low. Since your calcium is in the accepted range you can check it every so often and only add calcium if it drops below recommended levels.
    3. The dot should disappear completely. Make sure you hold the tube at waist level when you check it. I find I have to look away for a minute and re-read the test to make sure the dot is gone.

    Recommended Levels

    Vinyl with Bleach

    FC 3-7
    pH 7.5-7.8
    TA 70-90+
    CH 50-300
    CYA 30-50
    TFP Moderator
    Helpful links: TF Test Kits,TFP Pool School, PoolMath
    Vogue 21' round AG, Pentair 1 hp 2 speed pump, 36 sq ft DE filter, Hayward S180T 150# sand filter, Houston, Texas
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    frustratedpoolmom's Avatar
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    Re: Numbers and Questions

    The TA is fine where it is since you don't have an SWG or another source of aeration.
    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

  5. Back To Top    #5
    Butterfly's Avatar
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    Re: Numbers and Questions

    Hi esim13,

    Here is a visual that has helped lots of us get the hang of the CYA test.

    (Scroll down to see ths pics http://www.taylortechnologies.com/Chemi ... ntentID=44
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

    ~ One should not use a sledge hammer to swat a mosquito. ~

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