Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 8 of 8

Thread: Strange TA results w/ TF100 kit

  1. Back To Top    #1

    Strange TA results w/ TF100 kit

    I just purchased my first TF-100 test kit and couldn't be happier!! I placed the order around noon on Thursday and it arrived via USPS on Saturday!! Although my guests this weekend were looking at me as though I was a mad scientist in his laboratory as I mixed all the different reagents, I was thoroughly enjoying these new tests and learning that my test results would be so much more accurate than guessing at the color changes on my prior test strips!!

    However, I seem to be getting very strange results on my TA test. I've tested it two days in a row now and still getting results around 220-230. That seems to be off the charts for a TA level - especially considering all my other levels are within relatively normal limits:

    FC = 1 (added liquid bleach to bring this up to 4)
    CC = .5
    TC = 1.5
    pH = 7.3
    CH = 220
    CYA = 50

    I've noticed that most of the reagent bottles give off a nice sized "drop", but the R-0009 seems to give off very small drops and even the gentlest squeeze of the bottle sometimes throws off 2 drops (what I'm getting at is I'm wondering if the amount of or my count of the drops is even accurate).

    I've performed the TA test with my HTH (WalMart) test kit and am getting a consistent reading of 70.

    Any ideas what's wrong with my TF-100 testing?
    20'6" X 38'6" (609 sqft)
    22,500 gal gunite/plaster IGP
    DE filter, Jandy 2HP pump, Nature2 Sanitizer (removed cartridge!)
    Raypak 39.9K BTU gas heater
    2 ColorLogic lights, Maytronics Dolphin pool cleaner

  2. Back To Top    #2

    Join Date
    Apr 2009
    Location
    Northeast Ohio
    Posts
    221

    Re: Strange TA results w/ TF100 kit

    It's a known problem with the TA test. If you use a damp cloth and wipe the dropper between each drop you should get a proper sized drop and a correct TA number.
    32x16 ft Grecian rectangular vinyl pool 8ft on deep end - 19000 gal. 18" Hayward S-240 sand filter. 250K BTU Pentair MasterTemp heater. Hayward 3/4 HP Super Pump.

  3. Back To Top    #3

    Join Date
    Mar 2010
    Location
    Spring, TX
    Posts
    1,082

    Re: Strange TA results w/ TF100 kit

    With the TA test it can build up static, therefore not getting the same size drops. With this test you want the same size drops if possible. From what I have read, every 4-5 drops wipe the tip of the reagant and that should help. I wipe mine each time and get good results.

    Also with a CYA of 50, I assume no SWG, your targe FC is 6, but goal of 4-8. The Min which is 4, is something you FC should never fall below. When you get below this number you are at risk for things you do not want in the water. The CC of .5 is ok, but if you keep at most 4 FC, it will drop during the day if there is a lot of sun and can lead to bad things. So get your FC up to 6 and let that be your level. Do not let it drop below 4.

    Also your CH is low, so I would think about bringing that up to around 300. You could even go to the upper end of 350, as due to splash out and backwashing if you need to, you may lose some.

    Anymore questions just ask.
    13,000 Plaster IG Pool approx
    Hayward C5030 Cart Filter
    Emerson 1081 EB653 1.0 HP 1.40 S.F. 3450 RPM
    Pool Calculator, Pool School, TF Test Kits

  4. Back To Top    #4
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: Strange TA results w/ TF100 kit

    mynewpool, CYA is 50, not FC!

    The recommended FC level with CYA at 50 is between 4 and 8.
    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

  5. Back To Top    #5

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,077

    Re: Strange TA results w/ TF100 kit

    There should be a note in the instructions to wipe the dropper tip with a damp cloth as you count the drops. I think the note says after EVERY drop but usually every 2-3 drops will do.

    When the R-0009 is quite fresh, it actually has a static charge that causes it to "leap" from the dropper tip instead of dropping normally.....resulting in too small drops.

    Wiping the tip will eliminate the issue.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  6. Back To Top    #6

    Join Date
    Mar 2010
    Location
    Spring, TX
    Posts
    1,082

    Re: Strange TA results w/ TF100 kit

    Quote Originally Posted by JasonLion
    mynewpool, CYA is 50, not FC!

    The recommended FC level with CYA at 50 is between 4 and 8.
    Sorry honest mistake and hopefully did not stear the OP in the wrong direction.
    13,000 Plaster IG Pool approx
    Hayward C5030 Cart Filter
    Emerson 1081 EB653 1.0 HP 1.40 S.F. 3450 RPM
    Pool Calculator, Pool School, TF Test Kits

  7. Back To Top    #7

    Re: Strange TA results w/ TF100 kit

    My TF-100 kit does tell me in the directions to wipe the tip after every drop. It even provided a small cloth.
    Intex 20'x10'x52" 5,835 gallon above ground; vinyl; Intex 2,650-Gallon Sand Filter Pump; Intex Krystal Clear Saltwater System Model CS8110.

  8. Back To Top    #8
    Quinsee's Avatar
    Join Date
    Jun 2010
    Location
    Southern Indiana
    Posts
    32

    Re: Strange TA results w/ TF100 kit

    I just encountered the same problem.

    And here I thought I was getting good at following directions. Heading out to test the 4th time. Hopefully, it's not in the 400+ range again.
    Pool School - Pool Calculator - Chlorine Best Price Calculator - CYA/Chlorine Chart
    24' AGP w/ 48" walls, 13500 gal., 150lb Hayward sand filter, Century 1.5hp pump, South central Indiana
    !!Don't melt your kids!! Muriatic Acid mixed with bleach produces Chlorine gas. KEEP THEM SEPARATED!!

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •