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Thread: FC and CC test

  1. Back To Top    #1

    Join Date
    May 2016
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    Suwanee, GA
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    FC and CC test

    I am testing my FC and TC per the Chlorine Drop Test instructions on my TFTestKit I recently received. Seems rather straight forward but when I add the R-0871 solution one drop at a time the mixture will gradually turn from pink to clear as per directions . But the solution will only stay completely clear for say 30 seconds and gradually I t begins to it go back to a shade of pink--

    My question is --Is it accurate to take the reading when solution goes completely clear?? Why does it turn back to pink ? Am I to keep adding drops until it stays clear permanently ?

    Thanks !

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    Re: FC and CC test

    It does say in the extended directions if you leave it sit it will repinken (is that a word?, they didn't use repinken in extended directions, it just came off of these fingers naturally) ~ anyways it does say pink will come back in a minute or two. 30 seconds seems awfully quick, do you agitate by hand or do you have the speed stir?
    AGP: 27' x 52" : 17,500 gallon
    300 lb. Sand Filter (75 gpm) / 1.5 hp pump
    Full Sun ~ All Day

  3. Back To Top    #3
    Mod Squad jblizzle's Avatar
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    Re: FC and CC test

    That is normal. It will always turn back to pink if you wait long enough. If it is clear for a few seconds, you are done.

    When the sample is clear, you are done with the FC portion.
    Then add the 5 drops of R-0003 and count to clear again, then the CC is done.
    Jason, TFP Moderator
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  4. Back To Top    #4

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    Re: FC and CC test

    That's good to know --I must have misplaced those directions as I'm just looking at the laminated directions they sent--and I did not see anything referencing that --i can stop wasting the solution now-- 30 seconds was Just a guess I never really timed it--just knew it was not instantaneous ..

    Thnx

  5. Back To Top    #5
    Mod Squad jblizzle's Avatar
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    Re: FC and CC test

    The extended instructions are on the forum in Pool School.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

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