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Thread: Help with Tf-100 results

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    Help with Tf-100 results

    Alkalinity Test requires you to add drops until red, starting about 16 drops was pink, by drop 21 like a fushia pink. Do you keep adding until a true red?
    Above ground intex 24x 52 Swg with sand filter pump. Well water. New started the end of May. 11,600 gallons. Test kit TF100

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    Re: Help with Tf-100 results

    Here's how to do ANY drops based test....

    1. measure the sample size accurately. It takes just a little practice because of the curved meniscus but simply be consistent.....that's the key.

    2. HOLD THE DROPPER BOTTLE VERY VERTICAL The size of the hole in the dropper tip makes virtually no difference in the size of the drop. The drop is formed by clinging to the outside surface of the rounded dropper tip.As you continually squeeze out fluid, gravity takes over and the drop, perfectly and consistently formed, FALLS from the tip......FALLS from the tip.

    3. Carry the test to the endpoint. The endpoint of any drops based test is when the last drop you add makes no further change to the test solution. So, if your color starts to change.....keep dropping. If it looks like the change is complete.....keep dropping. It is only when that last drop makes absolutely no further change that your test is complete.

    4. Now, do the math. Subtract that last drop that made no further change from your total drops. The remainder of your drops is what you use to determine the results of your test.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
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    Re: Help with Tf-100 results

    Bubblegum pink is the endpoint.
    16 x 32 17500 gallons
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    Re: Help with Tf-100 results

    CYA test- says to fill tube until you can no longer see the black dot. I filled mine to the very top and could always see the black dot.
    Above ground intex 24x 52 Swg with sand filter pump. Well water. New started the end of May. 11,600 gallons. Test kit TF100

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    Re: Help with Tf-100 results

    That would indicate you have little to no CYA (stabilizer) and need to increase it to protect your FC.
    To increase CYA via granular stabilizer, place the required amount as calculated by the Poolmath calculator into a white sock and place in the poolside skimmer basket. For those concerned about suction flow to the pump, suspending the sock near a return jet or from a floating device will also suffice. Best never to allow undissolved granules to rest directly against the pool surface. Squeeze the sock periodically to help it dissipate. Once dissolved, consider your CYA adjusted to that programmed (target) level. CYA test readings should show a rise in 24-48 hours, however some pools may experience a longer delay to fully register. Best to confirm final CYA in about 5-7 days before adding any more stabilizer/conditioner.
    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
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    Re: Help with Tf-100 results

    That means you have less than 20 ppm CYA for sure. Have you added any powdered shock products containing dichlor or used any trichlor tablets so far since opening? If not, your CYA is 0. Otherwise if you have used them, assume your CYA is 10. Add enough to get your CYA up to 30 ppm to start.
    Joel - TFP Moderator - Minnesota - **Become a TFP Supporter!** Helpful Links: ABCs of Pool Water Chemistry - SLAM Procedure - Chlorine/CYA Chart
    40x20 Pool: 32K Gallons * Vinyl * Bleach Chlorination * Hayward S270T Sand Filter * Pentair SuperFlo 1 HP * Teledyne/Laars Heater * AquaVac Tigershark * TF-100 w/ SpeedStir
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    Re: Help with Tf-100 results

    Quote Originally Posted by blsobx View Post
    CYA test- says to fill tube until you can no longer see the black dot. I filled mine to the very top and could always see the black dot.
    Sounds like you have less than 20ppm CYA. Do you have a reason to think it's more? i.e. have you added any recently?

    edit: TxSplash and JVTrain beat me to it while typing.
    25 + year pool owner. Current pool (going on 11th year) - 38K gallon in ground Gunite/White Plaster, Spillover Spa, Hayward Cartridge Filter, Hayward 450k BTU NG Heater, Hayward Goldline Aqua Logic control with T-Cell-15 Salt Water Cell, Dolphin Explorer.
    You Need: Bleach, a A Test Kit & a Bookmark to "Pool School". Now what's your question?

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    Re: Help with Tf-100 results

    Never shocked pool but I did have chlorine tablets in floater until yesterday when I read on here your not suppose to.

    - - - Updated - - -

    I added when I first put up my pool but the guy who did it poured it straight in my pool and I backwashed pool 2 days before the 7th day.
    Above ground intex 24x 52 Swg with sand filter pump. Well water. New started the end of May. 11,600 gallons. Test kit TF100

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    Mod Squad JVTrain's Avatar
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    Re: Help with Tf-100 results

    It's a good assumption then that your CYA is about 10. Add enough CYA to get to 30 ppm. See the Recommended Pool Chemicals article on how to add CYA: Pool School - Recommended Pool Chemicals

    Solid/granular cyanuric acid (CYA) should be placed in a sock and the sock put in the skimmer basket or suspended in front of a pool return. After adding CYA you should leave the pump running for 24 hours and not backwash/clean the filter for a week. Squeezing the sock periodically will help it to dissolve faster. Test and dose chemicals in your pool assuming the amount of CYA added is in the pool according to Poolmath. CYA can be tested the day after it is fully dissolved from the sock.


    Even if your CYA happens to be almost 20 and you end up near 40 ppm, that's a good level for your region.
    Joel - TFP Moderator - Minnesota - **Become a TFP Supporter!** Helpful Links: ABCs of Pool Water Chemistry - SLAM Procedure - Chlorine/CYA Chart
    40x20 Pool: 32K Gallons * Vinyl * Bleach Chlorination * Hayward S270T Sand Filter * Pentair SuperFlo 1 HP * Teledyne/Laars Heater * AquaVac Tigershark * TF-100 w/ SpeedStir
    Isolated Spa - 345 Gallons

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    Re: Help with Tf-100 results

    Is it ok to run your SWG while the Cya is being dissolved? I also need another 40ls of salt, can I add this while Cya is dissolving?
    Above ground intex 24x 52 Swg with sand filter pump. Well water. New started the end of May. 11,600 gallons. Test kit TF100

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    Re: Help with Tf-100 results

    Quote Originally Posted by blsobx View Post
    Is it ok to run your SWG while the Cya is being dissolved? I also need another 40ls of salt, can I add this while Cya is dissolving?
    Yes....to both questions. You are better off running pump when adding salt or any chemicals really.
    18*36*23 true "L" vinyl IG 29,000 gallons. SWG. TF-100 test kit.
    http://tftestkits.net/splash-page.html

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    Re: Help with Tf-100 results

    All my test results are off ph,calcium hardness, alkalinity (need to redo test), do I work on one first and which one, or do I try to tackle all?
    Above ground intex 24x 52 Swg with sand filter pump. Well water. New started the end of May. 11,600 gallons. Test kit TF100

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    Re: Help with Tf-100 results

    pH first. What was CH? Unless it was stupid high it doesn't matter in a vinyl pool. If pH goes up, you will need to lower TA. If it swings around, it needs to come up. Just watch pH for a few weeks and see.
    32K gallon Plaster - 1hp Hayward 2 speed Super Pump - Hayward S200 Sand Filter - TF100XL
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    Re: Help with Tf-100 results

    calcium hardness is 175. Ph is 8.2 but I need to add CYA I thought I read that will lower ph some.
    Above ground intex 24x 52 Swg with sand filter pump. Well water. New started the end of May. 11,600 gallons. Test kit TF100

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    Re: Help with Tf-100 results

    Each lb of CYA lowers pH by 0.1. The max of the test is 8.2, it might be higher. It really needs to go down with acid. Target 7.5 so you don't over shoot.
    32K gallon Plaster - 1hp Hayward 2 speed Super Pump - Hayward S200 Sand Filter - TF100XL
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    Re: Help with Tf-100 results

    my free chlorine is 1. and my combined chlorine is 1.5
    Above ground intex 24x 52 Swg with sand filter pump. Well water. New started the end of May. 11,600 gallons. Test kit TF100

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    Re: Help with Tf-100 results

    Sounds like SLAM time to me! Pool School - SLAM - Shock Level And Maintain
    32K gallon Plaster - 1hp Hayward 2 speed Super Pump - Hayward S200 Sand Filter - TF100XL
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    Re: Help with Tf-100 results

    SO hitting the boost button is not good enough I need to shock/slam pool?

    - - - Updated - - -

    So overwhelmed! Thanks everyone for your help!
    Above ground intex 24x 52 Swg with sand filter pump. Well water. New started the end of May. 11,600 gallons. Test kit TF100

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    Re: Help with Tf-100 results

    A CC over 0.5 means that there is a significant amount of "things" the chlorine is working on. How's the water look? If it is clear-ish you might not be looking at a very long SLAM.
    32K gallon Plaster - 1hp Hayward 2 speed Super Pump - Hayward S200 Sand Filter - TF100XL
    Test Kits - Pool Math - Chlorine/CYA/Target/Slam Chart

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    Re: Help with Tf-100 results

    Very Clear. what is slamming is it the shock treatment that comes in a powdery form?
    Above ground intex 24x 52 Swg with sand filter pump. Well water. New started the end of May. 11,600 gallons. Test kit TF100

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