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Thread: 1st test with TF100

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    1st test with TF100

    PH looked a little lighter than 7.2 let's call it 7.1. I added 10 oz of soda ash.
    Chlorine with OTO showed 0 when drops were initial added a few minutes later showed around 2.5

    FC might have showed a hint of pink, 1 drop & was clear - call it .5
    CC 6 drops = 3.0 (I expected this to be higher)

    CH - 750?! (30 drops of R0012) Leslie's said 160 & had me add 20 lbs of adjuster. Retest @ Leslie's on Sunday showed 270.

    TA -70 Leslie's showed 60 2 weeks ago & 80 last Sunday. We're close on this test.

    CYA - I had the tube completely filled & could still see the dot. Must be less than 15. Both times at Leslie's - 40.

    My plan for later tonight is to add 1/2 gal of 10% liquid chorine & retest to confirm my results. I'd like to start SLAMing tomorrow. Should I be concerned with the CH?
    The pool water is clear. I've been using Leslie's 3 inch pucks, could my CYA really be less than 15?

    I ordered the TF100 on Sunday & received it today (Wednesday) - Great service

    Mike
    16' x 34' vinyl in ground - 16,500 gal.
    Hayward EC-75 DE filter with Hayward 1hp Super Pump
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    Re: 1st test with TF100

    Did you just open your pool?
    JD - 28' Round Above Ground Pool, 17,000 Gallons. Dual speed Jacuzzi pump with cartridge filter. Dual speed 1 HP pump, Hayward S210T sand filter
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    Mod Squad tim5055's Avatar
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    Re: 1st test with TF100

    Quote Originally Posted by Mike1162 View Post
    Chlorine with OTO showed 0 when drops were initial added a few minutes later showed around 2.5

    FC might have showed a hint of pink, 1 drop & was clear - call it .5
    If you are going ot do the FAS/DPD test there is no need to do the OTO test. While talking about the OTO, don't let it sit. It is the reading when you add the drops and shake. In your case clear. Letting it sit to get a color is not a valid test. That the FAS/DPD showed .5 validates the original "0" reading on the OTO
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

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    Re: 1st test with TF100

    Quote Originally Posted by tim5055 View Post
    While talking about the OTO, don't let it sit. It is the reading when you add the drops and shake. In your case clear. Letting it sit to get a color is not a valid test.
    That is not exactly true. Immediately upon adding drops and shaking you can get a sense of the FC, the sample will fairly quickly change to the TC reading. So if you see a shift, that indicates the presence of CC. Which actually matches what the FAS-DPD indicated. So I would not say it "is not a valid test"

    This is actually really neat that you were able to observe the OTO shift and it gave results basically the same as the FAS-DPD. It is like confirmation of the "theory" ... seeing is believing
    Jason, TFP Moderator
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    Re: 1st test with TF100

    30 drops for the CH test = 300, not 750. You could keep using the pucks to add to the CYA. You could also benefit from the pucks while slamming, a CC of 3 is rather high. Just keep an eye on the Ph, it will gradually drop while using the pucks.
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    Mod Squad jblizzle's Avatar
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    Re: 1st test with TF100

    Quote Originally Posted by LI poolguy View Post
    30 drops for the CH test = 300, not 750.
    Depends on how much water is used for the sample. The TF-100 recommends 10ml of water so each drop is 25ppm. The K-2006 recommends 25ml of water so each drop is 10ppm. There is no need for the precision of the K-2006 method.
    Jason, TFP Moderator
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    Re: 1st test with TF100

    Quote Originally Posted by jblizzle View Post
    Depends on how much water is used for the sample. The TF-100 recommends 10ml of water so each drop is 25ppm. The K-2006 recommends 25ml of water so each drop is 10ppm. There is no need for the precision of the K-2006 method.
    MY TF test kit says to use 25ml of water and multiply by 10 per drop. Looking at the card that came with it right now
    Doughboy 12' x 20' Saphire semi-AG, Installed 2012
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    Mod Squad jblizzle's Avatar
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    Re: 1st test with TF100

    OK ... the new TF-100 instructions recommend the 10ml of water
    Just use 10 drops of the first reagent, 3-5 drops of the 2nd, then multiple the 3rd reagent by 25ppm
    Jason, TFP Moderator
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    Re: 1st test with TF100

    Quote Originally Posted by jblizzle View Post
    OK ... the new TF-100 instructions recommend the 10ml of water
    Just use 10 drops of the first reagent, 3-5 drops of the 2nd, then multiple the 3rd reagent by 25ppm
    Didn't know it changed. Thanks for pointing that out!! When/why did it change?
    Doughboy 12' x 20' Saphire semi-AG, Installed 2012
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    Mod Squad jblizzle's Avatar
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    Re: 1st test with TF100

    To save reagent and allow more tests, since there is no need to know the CH to the nearest 10ppm.
    Jason, TFP Moderator
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    Re: 1st test with TF100

    Gotcha. Although, multiplying by 10 is much easier than multiplying by 25. Also, how many times does one really need to test for CH? I do it once in the beginning of the season and once at the end (splash out reduces it, and it gives me reason to use up the cal hypo). Reagents last forever with that test. I guess I'm lucky, tap water here is Ph neutral, zero metals and zero hardness. I used a RODI system for my reef tank many years ago. I tested the tap water and RODI water, only difference was a TDS of 1 with the RODI and a TDS of 12 from the tap.
    Doughboy 12' x 20' Saphire semi-AG, Installed 2012
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    Re: 1st test with TF100

    Quote Originally Posted by jblizzle View Post
    That is not exactly true. Immediately upon adding drops and shaking you can get a sense of the FC, the sample will fairly quickly change to the TC reading. So if you see a shift, that indicates the presence of CC. Which actually matches what the FAS-DPD indicated. So I would not say it "is not a valid test"

    This is actually really neat that you were able to observe the OTO shift and it gave results basically the same as the FAS-DPD. It is like confirmation of the "theory" ... seeing is believing
    The "OTO Shift" is what led me to this site. I've had this pool for 19 years & never saw this happen before. I've always had algae flair ups & just thought that came along with having a pool. I've done some reading on the forum & did some cleaning armed with this new knowledge. There was some algae around the molding for the stairs, some more on the underside of the steps. I removed the light & the housing was a slimy mess. Inside the trim on the skimmer I brushed away something that was black. Not sure if it was some kind of mold or maybe excess gasket material but it sure made a mess. I also cleaned the filter last week. Hopefully all this work will make for an easy SLAM.
    16' x 34' vinyl in ground - 16,500 gal.
    Hayward EC-75 DE filter with Hayward 1hp Super Pump
    TF-100XL Test Kit with SpeedStir

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    Re: 1st test with TF100

    2nd test results.

    PH - 7.3
    FC - 1
    CC - 1.5
    CH - 750 (30 drops in 10 ml)
    TA - 70
    CYA - 20 (Might have been holding too close the 1st time.)

    The 1/2 gal of chlorine should have brought the level up to 3 ppm.
    Can I start the Slam or do I need to do something with the CH?

    Mike

    Forgot to post pic in 1st post.

    16' x 34' vinyl in ground - 16,500 gal.
    Hayward EC-75 DE filter with Hayward 1hp Super Pump
    TF-100XL Test Kit with SpeedStir

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    Re: 1st test with TF100

    I still need to know if I can start the SLAM or If the CH needs to be brought down.
    Last edited by jblizzle; 06-18-2015 at 12:29 PM. Reason: Removed comment directed at hijacker
    16' x 34' vinyl in ground - 16,500 gal.
    Hayward EC-75 DE filter with Hayward 1hp Super Pump
    TF-100XL Test Kit with SpeedStir

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    Re: 1st test with TF100

    Hey Mike, your CH is high but shouldn't affect your SLAM.

    Looking at your pool it should be a quick one!

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    Re: 1st test with TF100

    6:30 pm
    added 2 gals chlorine

    7:15 pm
    FC = 10.5
    CC = 1.5
    Added gal

    8:40 pm
    FC = 7.5
    CC = 1.0
    Added 1 gal

    9:30 pm
    FC = 12
    CC = 1.0
    16' x 34' vinyl in ground - 16,500 gal.
    Hayward EC-75 DE filter with Hayward 1hp Super Pump
    TF-100XL Test Kit with SpeedStir

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    Mod Squad tim5055's Avatar
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    Re: 1st test with TF100

    Keep it up. Early in the SLAM hit it often. Chlorine is your friend.
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

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    Re: 1st test with TF100

    10:00 pm
    FC = 9.5
    CC = 1.0
    Added 1 gal

    Going to bed - 5am comes early.

    16' x 34' vinyl in ground - 16,500 gal.
    Hayward EC-75 DE filter with Hayward 1hp Super Pump
    TF-100XL Test Kit with SpeedStir

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    Re: 1st test with TF100

    So far today:
    5:45 am
    FC = 6
    CC = .5
    Then added 1 gal

    6:15 am
    FC = 13
    CC = .5
    Then added 1 gal

    11:30 am
    FC = 13
    CC = .5
    Then added 1 gal

    4:45 pm
    FC = 14.5
    CC = .5
    Nothing added

    I'm going in shortly to brush the walls, spotted one little patch of old algae. It's maybe 2 square inches. I'd like to see the CC drop to zero. I'm thinking of adding another gal when I get out then checking & recheck in the morning.

    16' x 34' vinyl in ground - 16,500 gal.
    Hayward EC-75 DE filter with Hayward 1hp Super Pump
    TF-100XL Test Kit with SpeedStir

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    Re: 1st test with TF100


    8:45
    FC = 12.5
    CC = .5
    Then added 1 gal

    10:00 pm
    FC = 17
    CC = .5
    Nothing added

    5:30 am
    FC = 14
    CC = .5
    Nothing added

    12:15 pm
    FC = 9
    CC = .5
    Nothing added

    Looks like I'm not quite there, dropped 3ppm overnight.

    I'm expecting the grandchildren to come swimming shortly. Should I add a gal now & probably add another this evening or can I just add 2 gals this evening?

    The FC dropped 3 over night & 5 in about the same time period with the sun. Looks like the sun burned off about 2ppm in roughly 6 1/2 hours. Is that about normal or a sign the CYA is low. Pool store said CYA was 40 my testing showed 20.

    16' x 34' vinyl in ground - 16,500 gal.
    Hayward EC-75 DE filter with Hayward 1hp Super Pump
    TF-100XL Test Kit with SpeedStir

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