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Thread: A Little confused on Chlorine testing

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    A Little confused on Chlorine testing

    Ok I am trying to figure out which test I am actually doing and where its supposed to be. I have a TF100 and everyday I am using the blue "Taylor" chlorine/Ph test kit. Which type of chlorine test is this CC, FC, or TC?? Either way, here are my numbers...keep in mind that I have added almost a whole jug of bleach in the past three days and my daily chlorine test (in the Taylor kit) never gets above 1. I have also added stabilizer yesterday to raise my CYA. Any input would be greatly appreciated!!!

    Powder chlorine test results are .5
    Liquid chlorine test (from the small Taylor box) are 1
    CYA was 0 yesterday but I added some Stab for it
    TA is 80
    Ph is about 7.5
    17100 Gallon AGP, Sta-Rite 150sq ft ModMedia Filter, Sta-Rite 1.5 hp Pump

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    Re: A Little confused on Chlorine testing

    What was the goal for the CYA addition? (Stabilizer)
    23,000 gallon in ground pool with rock waterfall and spillover spa, Aqualink control system, Polaris 380 cleaner, Purex Triton Clean&Clear Plus cartridge filter. Located in The Woodlands, Texas.

    Pool owner since Nov 2008, Trouble Free since April 2009. Happy to help when I can.

  3. Back To Top    #3
    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: A Little confused on Chlorine testing

    The chlorine test in the Taylor K-1000, which comes inside the TF-100, is an OTO chlorine test, drops turn the sample yellow which is then compared to a color reference. The OTO test measures TC levels and is not especially precise. The OTO test is very good for a quick chlorine/no chlorine determination, but not so good at reading out a specific level.

    Many people use the OTO test day to day just to make sure nothing has gone completely wrong, and then use the full FAS-DPD test (powder turns the sample pink, and then drops turn it clear again) once a week to see exactly where they really are and adjust how much chlorine gets added daily for the next week.
    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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    Butterfly's Avatar
    Join Date
    May 2007
    South Carolina

    Re: A Little confused on Chlorine testing

    How much stabilizer did you add and how did you add it?

    Don't let your FC drop below 2ppm for now.

    Please tell us all about your pool and equipment.

    Also, how does your water look?
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

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    Re: A Little confused on Chlorine testing

    The water looks fine, I just filled the pool so its pretty fresh. I added about 2 lbs of Stabilizer through the skimmer (without the sock) and ran the pump for 24 hours. I have 1 27' Round 17000 Gallon pool with a Sta Rite 150 sq ft ModMedia filter and 1.5 hp pump. Ill look into the FC test tomorrow...not sure if ive done it yet....
    17100 Gallon AGP, Sta-Rite 150sq ft ModMedia Filter, Sta-Rite 1.5 hp Pump

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    Richard320's Avatar
    Join Date
    Jan 2010
    San Dimas, CA (LA County)

    Re: A Little confused on Chlorine testing

    A whole jug in 17000 gallons isn't really very much, especially as there is no CYA to protect it from the sun. My pool is 16000 gallons of overstabilized water and I still use up about a quart a day of 10% pool-store chlorine.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    Re: A Little confused on Chlorine testing

    Ok I just did the FC test and CC test....They were .5 each....The water also did not turn very pink, but it did change color a little bit. I am not going to test my CYA until the end of the week since I just added Stabilizer Sunday. Should I add a jug of bleach daily until my FC goes up to 2 or 3??? Also, the scoop the test is referring to is the small blue one included in the kit right?? Just wanted to be sure. Thanks in advance!
    17100 Gallon AGP, Sta-Rite 150sq ft ModMedia Filter, Sta-Rite 1.5 hp Pump

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    frustratedpoolmom's Avatar
    Join Date
    May 2007
    SWSuburban Chicago, IL

    Re: A Little confused on Chlorine testing

    Yes, the small blue scoop.
    You want to calculate how much bleach to add to reach 4ppm (it might be less than a jug, might be more) target that number each night which should keep you above your "min" which is 2ppm.
    2 lbs would only increase your CYA by 14, so you should add another 2-4 lbs as soon as you can.
    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

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