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Thread: New TF 100 kit....questions...

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    New TF 100 kit....questions...

    I have officially taken the plunge thanks to the arrival of my new TF100 kit yesterday. My first test went ok but there were some diffculties. The first thing i discovered and already suspected was that my TC was too high for the standard test, so i had to do the drop test. That test yielded a result of 13.5 for TC.

    So does that alter other tests since it is so high? Also my TA was way high for what i expected. I first was stumped because due to the high chlorine the water went from blue to yellow instead of red. I finally read that this was normal and then retested. Oddly enough the next time it turned to red. Go figure....

    Anyway i performed the test 3 times because it kept giving me readings in the 200's, which isn't what the results from the pool store have been telling me. One thing i am concerned about is the R009 where you add drops, swirling between drops...the drops seemed to be MUCH smaller than the other reagents. Is this normal?

    I am going to retest today but if it is accurate it appears i need to add muriatic acid. I think the calculator told me 36 oz. Regardless here are my results, i am just not totally confident in them...

    FC 13.5
    CC 0
    TC 13.5
    pH 7.8
    TA 260
    CYA 120

    Water is crystal clear and has been for weeks. It does try and leave bathtub rings on the fiberglass sides from time to time but other than that all is well.
    10,000 gallon
    Viking Freeform Fiberglass Inground Pool. FNS Plus DE Filter Pentair Challenger .75hp pump

    NC KANSAS44

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    Mod Squad JohnT's Avatar
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    Re: New TF 100 kit....questions...

    The ability to measure the higher chlorine levels is one of the great benefits of the good kit.

    Static build-up is a problem for the TA test, and a possible solution is to wipe the dropper tip with a damp cloth between drops or at least periodically during testing.

    The high chlorine can alter the pH test, although the reagent does allow for some elevated chlorine. It's usually a good idea to know what your pH is before you shock the pool so you can safely ignore it for a while.
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

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    frustratedpoolmom's Avatar
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    Re: New TF 100 kit....questions...

    CYA 120
    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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    Re: New TF 100 kit....questions...

    I just took a sample up to the pool store to compare. This sample would have been taken 12 hrs later than my test. Here is what the pool store results are:

    POOL STORE
    FC 6.9
    TC 7
    CC .2
    pH 8.0
    Hardness 230
    TA 180
    CYA 50

    TF100

    FC 13.5
    CC 0
    TC 13.5
    pH 7.8
    TA 260
    CYA 120

    Some things jive some things don't. Obviously there is the time factor but I doubt my CYA could drop 70ppm overnight. The CYA test in the TF100 has you add drops till you can no longer see the black dot in the bottom of the tube. That seems a bit subjective...?

    I am still new and learning so hopefully i will get more confidence with the kit. Right now i don't have much. It does look like i need to add some muriatic acid which i just bought. What is the best way to add? Pump running or pump off? I have read several different opinions.
    10,000 gallon
    Viking Freeform Fiberglass Inground Pool. FNS Plus DE Filter Pentair Challenger .75hp pump

    NC KANSAS44

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    Mod Squad Bama Rambler's Avatar
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    Re: New TF 100 kit....questions...

    The CYA test is a testy one to do. You mix equal parts of pool water and reagent in the bottle (to the label marks) and swirl it. Then set it down for 30 seconds, then swirl it again and pour it into the view tube until the black dot completely disappears. At 120 you barely got any in before the dot was gone? You can pour the sample back and forth a few times to get a feel for where it disappears.

    You will get better at it the more you do it.

    Always add chems with the pump running and circulating the water. Most all the chemicals should be added in front of a flowing return.
    Another note: Always test after the pump has been running about an hour.
    Dave J. TFP Moderator
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    JasonLion's Avatar
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    Re: New TF 100 kit....questions...

    The CYA test should be done in indirect sunlight and the black dot should be totally invisible. As Bama said, you can pour back and forth and try it out several times to get a feeling for it.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    frustratedpoolmom's Avatar
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    Re: New TF 100 kit....questions...

    "swirl?" I shake my mixing bottle for 30 seconds, let it rest and then shake it for 30 seconds more, then pour into the view tube.

    Did you redo the TA test with the damp cloth trick?
    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 Bama Rambler's Avatar
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    Re: New TF 100 kit....questions...

    Sorry, I cheat cause I use a magnetic stirrer. Maybe I should have used intermingle???
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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    frustratedpoolmom's Avatar
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    Re: New TF 100 kit....questions...

    Hmmm... never tried it with that. I alwasy thought you HAD to shake it to mix.
    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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    Butterfly's Avatar
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    Re: New TF 100 kit....questions...

    Quote Originally Posted by frustratedpoolmom
    Hmmm... never tried it with that. I alwasy thought you HAD to shake it to mix.
    Me, too!

    For the OP, here's a link to Taylor for a visual on the CYA test. Scroll down for pics:

    http://www.taylortechnologies.com/Chemi ... ntentID=44

    hth
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
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    Re: New TF 100 kit....questions...

    Quote Originally Posted by Bama Rambler
    Sorry, I cheat cause I use a magnetic stirrer. Maybe I should have used intermingle???
    HAH! I've been cheating ever since I got the stirrer! You shakers should give it a try...you might like it on the wild side...
    20K gal IG plaster pool, Manually chlorinated with 6% bleach, 1.5 HP Sta-Rite Dura-Glas II pump, Pentair FNS Plus 48 DE filter, Polaris 280

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    TimS's Avatar
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    Re: New TF 100 kit....questions...

    Quote Originally Posted by Beez
    Quote Originally Posted by Bama Rambler
    Sorry, I cheat cause I use a magnetic stirrer. Maybe I should have used intermingle???
    HAH! I've been cheating ever since I got the stirrer! You shakers should give it a try...you might like it on the wild side...
    Interesting. Since I was testing with cold water, I used the "shaken, not stirred" method, and warmed it at the same time.
    24' AG Round (vinyl replaced 0909) - 13500 gal - Sand Dollar Filter (150lb) - Dynamo DYNII-N1-1 1HP - Hayward HP380 Heat Pump - TF-100.
    Central Missouri

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    Re: New TF 100 kit....questions...

    Stirring with the magnetic stirrer should be fine since the point is just to have very thorough mixing, but you still have to stir for 30 seconds since it still takes time for the precipitation reaction to occur even with perfect mixing.
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
    12 Fafco solar panels; Purex Triton PowerMax 250 natural gas heater (200,000 BTU/hr output); automatic electric pool safety cover; 4-wheel pressure-side "The Pool Cleaner"

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    frustratedpoolmom's Avatar
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    Re: New TF 100 kit....questions...

    See, learn somethin' new everyday!
    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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    Re: New TF 100 kit....questions...

    The TF100 kit just has a simple tube with a black dot in the bottom. I retested today and got the cya down to around 90 but i am beginning to think you can make it whatever you want, by either mixing longer or adding more sample water etc.
    10,000 gallon
    Viking Freeform Fiberglass Inground Pool. FNS Plus DE Filter Pentair Challenger .75hp pump

    NC KANSAS44

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    Re: New TF 100 kit....questions...

    Mixing longer is irrelevant. Are you saying to change the 50-50 mix of pool water and Reagent? Why would you do that?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: New TF 100 kit....questions...

    What I found after using my test kit for a while was that I was getting consistent readings from all my tests -- within the error band of the particular test. For me the CYA test has the largest error band, but the sample mixture last for a few moments and you can reuse it several times to zero in on a reading. I've taken my water to the pool store to be tested and their results were much different than mine (they used strips read by a computer). I trust my results over theirs.

    Once you feel good about your CYA level you can forget what the pool store test says and decide how to manage your pool.

    Good luck,
    Gordon
    27K gal, IG vinyl, 1.5 HP pump, 24" sand filter, Goldline Aqua Plus SWG

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