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Thread: Question about FAS-DPD powder in the TF100 Kit

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    Question about FAS-DPD powder in the TF100 Kit

    This has been bothering me for some time. When I get the powder part of the test at the beginning it is in the form of a fine powder. Overtime, maybe a few weeks at max it starts to bond together and form small little pebbles of the powder. I shake the container but the little pebbles do not seem to want to break apart. I try to use the scoop to break it apart and that does not seem to work. I feel as if when I am doing testing and there are several pebbles in the water instead of the fine powder how it starts my test results are not as accurate.

    I do keep my test kit out of sunlight in my laundry room inside a cabinet. It does not get hot in there so wondering why this is happening and how I can prevent it from happening?

    Thanks in advance
    13,000 Plaster IG Pool approx
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    pwrstrk's Avatar
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    Re: Question about FAS-DPD powder in the TF100 Kit

    Mine has the small clumps also. They usually all dissolve by the end of the test. I try to only get a few of the at a time for the test.
    Jeff
    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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    Mod Squad jblizzle's Avatar
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    Re: Question about FAS-DPD powder in the TF100 Kit

    The clumping is common and no big deal. Just grind the powder back up a little bit before you use it.
    Jason, TFP Moderator
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    Re: Question about FAS-DPD powder in the TF100 Kit

    Quote Originally Posted by jblizzle
    The clumping is common and no big deal. Just grind the powder back up a little bit before you use it.
    What is the best way to do this? I have tried shaking the container, I have tried spinning it around with the school and nothing seems to break it up. I tried pushing it with my fingers and that didnt seem to do the trick either.

    Also I noticed that when I get it, the powder is white, but when it starts to clump it seems to have a purple tint to it.
    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

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    Mod Squad jblizzle's Avatar
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    Re: Question about FAS-DPD powder in the TF100 Kit

    The color change is also no big deal. I have never dealt with bad clumping. Try to just crush it with something in the little container.

    Sounds like it may have gotten a little wet?
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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    Administrator Leebo's Avatar
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    Re: Question about FAS-DPD powder in the TF100 Kit

    Odds says moisture got in somewhat. Use the spoon and break it up some.

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    Re: Question about FAS-DPD powder in the TF100 Kit

    I have tried the spoon does not seem to work. I dont feel as if any moisture got in it. Maybe I will use the weight thing that allows you to measure correct sample size.
    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

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    Mod Squad jblizzle's Avatar
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    Re: Question about FAS-DPD powder in the TF100 Kit

    You can not hurt it getting a little aggressive. As long as you do not break the plastic container
    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
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