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Thread: TF-1000 test kit help!

  1. Back To Top    #1

    Join Date
    Jul 2014
    Norristown, PA

    TF-1000 test kit help!

    Hey all...

    So I have been using my new test kit to test the works. Here are my results today:
    Ph: 7.8
    ta: 90
    Fc: 2.0

    I'd like to know if I'm doing the cya test correctly. Should I not see a black dot on the bottom of the cylinder at all? Or should I see a blurry image?

    The pool store says my cya is 60, but I used this lot and both times saw no black dot closest to 30. Any input would be appreciated!
    Plaster, In Ground, 18000 Gallons. Pentair DE Filter (pentair fns plus de 48 sq ft filter), and a Pentair 3/4 HP Whisperflo Pump

  2. Back To Top    #2

    Join Date
    Aug 2011
    Cochranville, PA

    Re: TF-1000 test kit help!

    This is the extended test kit directions. I hate the CYA test. I am never sure if I am seeing the dot or I think I am seeing the dot. I do my best to do the test but truly rely on what I have added and use the test to confirm that.

    CYA - Cyanuric Acid

    Fill the mixing bottle to the lower mark with pool water. The lower mark may be labeled as 7 ml, 15 ml, or not labeled.
    If the pool water is below 70 degrees, allow the water sample to warm up to room temperature before continuing.
    Continue filling to the upper mark with R-0013. The upper mark may be labeled as 14 ml, or not labeled, or there may not be a mark and you fill to the base of the neck of the bottle.
    Cap and then shake the mixing bottle for 30 seconds.
    Stand outdoors with your back to the sun and hold the view tube at about waist level. If sunlight is not available, find the brightest artificial light you can.
    Looking down into the view tube, slowly pour the mixture from the mixing bottle into the view tube.
    Continue pouring until all traces of the black dot at the bottom of the view tube completely disappear, even after you stare at it for several seconds, or you fill the view tube.
    Reading the result:
    If the view tube is completely full, and you can still see the black dot clearly, your CYA level is zero.
    If the view tube is completely full and the black dot is only partially obscured, your CYA level is above zero but lower than the lowest level your test kit can measure (20 or 30 ppm).
    If the tube is not completely full, look at the scale on the side of the view tube. The labeled mark closest to the liquid level indicates your CYA level.
    If your CYA level is 90 or higher, repeat the test adjusting the procedure as follows:
    Fill the mixing bottle to the lower mark with pool water.
    Continue filling the mixing bottle to the upper mark with tap water.
    Shake briefly to mix.
    Pour off half of the contents of the mixing bottle, so it is again filled to the lower mark.
    Continue the test normally from step 3, but multiply the final result by two.

    If you are not confident in your reading, you can pour the solution from the view tube back into the mixing bottle and then try filling the view tube again. You can repeat this portion of the test over and over again for several minutes without affecting the test results.
    This page at Taylor Technologies has photographs which show what the view tube looks like when the test is complete.
    Very rarely, cloudy or murky water can affect the CYA test. To check for this, fill the view tube with straight pool water. If you can still see the black dot clearly, the cloudy/murky water is not affecting the test result.
    View tubes and mixing bottles come in two common sizes. One set requires 7 ml each of pool water and reagent, and reads CYA levels down to 30. The other set uses 15 ml each of pool water and reagent, and reads CYA levels down to 20.
    It is also possible to get a tube with a sliding black dot, Taylor 4088, so that you move the black dot up and down in the sample, instead of pouring the sample into the view tube.
    If you are using the large view tube and know that your CYA level is at least 50, you can use half as much pool water and half as much R-0013 to save on reagent.
    R-0013 contains melamine, which binds to cyanuric acid, forming the white precipitate which turns the sample cloudy.
    The precision of the test, when done correctly, is around plus or minus 15 for levels up to 90 and plus or minus 30 for levels between 100 and 200. Novices often have problems reading the test correctly, and tend to get higher than actual readings.
    1) The size of your pool in gallons 4440.
    2) The type filter you have is an Intex 2500 gph and it has a re-useable fabric filter
    3) If your pool is an AG (above ground)
    4) Intex 15 by 48 metal frame.
    5) If you know, tell us the size pump 2500gph and the size (flow rate) of your filter.
    Southeastern, Pennsylvania.

  3. Back To Top    #3
    pwrstrk's Avatar
    Join Date
    Aug 2012
    Elverson Pa.

    TF-1000 test kit help!

    Right now your FC is at the min for your CYA level. If your CYA level is higher than 30, your FC is below the min. With your CYA at 30 you should be targeting an FC level of 6 and don't let it fall below 3. How are you chlorinating your pool now ?
    I would consider raising your CYA to 40. You'll get better protection from the sun at that level. Your FC level would then be 7 and not below 4.
    PH at 7.8 I would lower that a bit with acid to 7.5-7.4.
    Everything else looks good.
    24'x54" AG Morada RTR (by wilbar) 13'500 gal. Hayward Powerflo Matrix 1hp 2 speed. Hayward Perflex EC65 DE filter.

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