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Thread: Using tons of titrating solution

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    Using tons of titrating solution

    I have been shocking for 5 days now and going through TONS of the titrating solution, I'm afraid I will have to make another trip to Leslie's since my TF-100 refill won't be here until Tuesday.

    Is there anyway to use less? Can I put in 5ml and count each drop and 1ppm? Or how would it work?
    12,000 Gallon
    Hayward 2HP Pump
    Solar Panel
    TF-100 Kit
    Built 2004, bought Dec 2007
    BBB All the Way

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    Join Date
    Feb 2008
    Location
    Denton, TX
    Posts
    5,061

    Re: Using tons of titrating solution

    Are you talking about the FAS/DPD titrating reagent? If so, are you performing the test using a 10 ml sample, in which case each drop represents 0.5 ppm? I always test this way. There really isn't much of a point to test to 0.2 ppm accuracy and you save lots of reagent that way.

    Honestly, you may have to wait for Dave's refill to arrive. I know that neither of the Leslie's by my house even carry that reagent and when I asked them about it, they had no idea what I was even talking about. But, if you have placed the order already, it shouldn't take very long. Dave really gets his kits and stuff out there to you quickly.

  3. Back To Top    #3

    Re: Using tons of titrating solution

    Well my question was if I use a 5ml sample would that make each reagent drop worth 1ppm instead of .5? I am trying to use even less, currently everytime I test I am using 30 drops.

    I ran out of TF-100 reagent on Wed, went to Leslie's commercial store and got some and almost out again.

    What do I do if I run out? I can't stock shocking till this is gone. I guess just dump in a bunch of chlorine constantly.
    12,000 Gallon
    Hayward 2HP Pump
    Solar Panel
    TF-100 Kit
    Built 2004, bought Dec 2007
    BBB All the Way

  4. Back To Top    #4

    Join Date
    Mar 2007
    Location
    San Rafael, CA USA
    Posts
    12,082

    Re: Using tons of titrating solution

    Yes, you can use a 5 ml sample and each drop will represent 1 ppm FC. Since you are really just roughly estimating a high FC level you could use dilution with the OTO test -- diluting 1 part pool water with 9 parts filtered or distilled water which should read around 3 ppm FC on the OTO test. Though this isn't accurate, it will tell you the ballpark of having somewhere in the neighborhood of 20-40 ppm FC which is OK. However, it sounds like the 5 ml sample size with FAS-DPD will work for you.

    Is your water clearing up?

    Richard
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
    12 Fafco solar panels; Purex Triton PowerMax 250 natural gas heater (200,000 BTU/hr output); automatic electric pool safety cover; 4-wheel pressure-side "The Pool Cleaner"

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