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Thread: First test with TF100 kit

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    First test with TF100 kit

    Hello,

    Pool was opened about 10 days ago. Was using a cover, but it stopped working. Today is the 3rd day that the pool was uncovered 24hours.

    Here's my results:

    FC.05
    CC .05
    Calcium 325
    Alkalinity 70
    CYA 0

    How do I raise the CYA? I assume what's that comes up, the chlorine will start lasting longer?
    33,000 IG vinyl DE

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    Mod Squad jblizzle's Avatar
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    Re: First test with TF100 kit

    That FC number is not possible. Each drop is 0.5ppm (likely a typo in your post).

    What has been added to the pool in the last 10 days? Did anyone add stabilizer? You certainly need to do so.

    How are you chlorinating?

    Have you discovered Pool School yet? Start with these:
    ABCs of Water Chemistry
    Recommended Pool Chemicals
    How to Chlorinate Your Pool
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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    Richard320's Avatar
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    Re: First test with TF100 kit

    Ooh, how exciting!



    You need the pH result, too. And I suspect a problem with the decimal point somewhere in your chlorine calculations.

    Yes, raising CYA will help your expensive bleach to last more than a couple hours in the sun. Don't aim higher than 40 just in case your pool isn't as big as you think. You can always add more. Getting rid of the excess is a PITA.

    If you have some chemicals standing by....
    1) Adjust pH if it's out of whack
    2) Raise FC to 3
    3) Add CYA using the sock method.

    You need to wait fifteen minutes or so between the pH and FC adjustments. CYA can be done immediately after either.
    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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    Re: First test with TF100 kit

    Thank you for your response! In my haste I failed to mention what I've been adding and my PH. PH was at 6.8 I purchased borax online and it should arrive today. I've added 170 oz of 6% bleach, the past 2 days. Additionally, I have 3 hockey puck chlorine tablets sitting in each skimmer basket.

    Does it matter which I raise first (FC or PH)?

    Thank you!

    - - - Updated - - -

    Typo. chlorine is 0.5ppm
    33,000 IG vinyl DE

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    Re: First test with TF100 kit

    I recommend not putting pucks in the skimmer basket unless you are running the pump 24/7. Even then, I won't do it, but that's me.

    pH is easy to raise, do that first. You may likely find that your FC doesn't hold from being so low, so you may be SLAMming soon. In fact, it already sounds like it isn't holding.
    Built in 1957 44,000 gallon in-ground, Wet Edge Primera Stone in Sky Blue, Intelliflo VF Pump, 600 lb. Pentair Triton II TR-100 Sand Filter, CircuPool RG 60 Plus SWG, TF-100 test kit
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    Richard320's Avatar
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    Re: First test with TF100 kit

    Quote Originally Posted by yesjenks View Post
    Thank you for your response! In my haste I failed to mention what I've been adding and my PH. PH was at 6.8 I purchased borax online and it should arrive today. I've added 170 oz of 6% bleach, the past 2 days. Additionally, I have 3 hockey puck chlorine tablets sitting in each skimmer basket.

    Does it matter which I raise first (FC or PH)?

    Thank you!

    - - - Updated - - -

    Typo. chlorine is 0.5ppm
    Not really.

    Note that those pucks are very acidic so you're actually making the pH situation worse. Probably lower it by .2 or so. And they won't add any significant amount of FC or CYA in a pool your size. By the time they've dissolved, that 24 ounces of trichlor will have only added 5 FC and 3 CYA. The FC will be gone with the sun and that small amount of CYA probably won't even affect your test results when you do add CYA granules.
    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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    borjis's Avatar
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    Re: First test with TF100 kit

    Quote Originally Posted by yesjenks View Post
    I have 3 hockey puck chlorine tablets sitting in each skimmer basket.

    WHOA THERE!!!

    REMOVE the chlorine tabs from your skimmer basket as quickly as possible.

    That's especially BAD with a vinyl lined pool.

    look what happened to this guy's liner:

    Pool Liner Issue
    16x32 IG Vinyl, 13,000 Gals. Hayward S-244T sand filter, SP2810X15 pump
    (1.5 HP motor) Raypak PR266AEN (266k btu) gas heater. TF-100 Test Kit.
    Dolphin E10 Cleaning Robot.

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    Re: First test with TF100 kit

    Wow! Taking the pucks out as soon as I get home. Total waste of $ huh? Never would've thought!

    Think slamming is necessary? I'll read up on it now, as I have no clue what it means. Chlorine really isn't holding.
    33,000 IG vinyl DE

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    Mod Squad jblizzle's Avatar
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    Re: First test with TF100 kit

    In your climate, you can likely use the tablets, but they should never be put in the skimmer.

    You need to learn what they are doing to your pool though, have you read all the link I provided in the first response?
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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  10. Back To Top    #10

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    Re: First test with TF100 kit

    Read the first 2. Seems the 3rd discusses the hockey pucks. Will read this evening.

    Thank yoU!
    33,000 IG vinyl DE

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