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Thread: Is my DPD powder still ok?

  1. Back To Top    #1

    Join Date
    Aug 2009
    Location
    SF Bay Area (Lamorinda), CA
    Posts
    122

    Is my DPD powder still ok?

    all right, I knew keeping my test kit in the shed during the winter wasn't a good idea, but I did, and somehow my container of DPD powder got enough moisture in it (lid was open for an unknown amount of time) and now it's just a solid chunk instead of powder. Is it still usable and if so, any hints on how to break it up?
    1950's-era 17K gallon formerly fiberglass, newly replastered IG rectangle (~15x30'),
    Hayward S244S Sand Filter with Franklin Electric 0.75 HP motor and WhisperFlo WFE-3 pump
    Clear ThermaTex bubble cover
    Manual vacuum

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: Is my DPD powder still ok?

    The powder generally survives bad treatment better than the titrant. You need to grind it back down with a mortar and pestle.
    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

  3. Back To Top    #3

    Join Date
    Jun 2013
    Location
    SpringHill FL
    Posts
    415

    Re: Is my DPD powder still ok?

    Yeah if you break it up it will be useable. Try a flat head screwdriver and scrape it out onto a plate then crush it back to powder and pour it back in the container
    Nathan
    15x30 gunite 18k gallons Hayward star clear plus 120sqft cart

  4. Back To Top    #4

    Join Date
    Aug 2009
    Location
    SF Bay Area (Lamorinda), CA
    Posts
    122

    Re: Is my DPD powder still ok?

    Thanks!
    1950's-era 17K gallon formerly fiberglass, newly replastered IG rectangle (~15x30'),
    Hayward S244S Sand Filter with Franklin Electric 0.75 HP motor and WhisperFlo WFE-3 pump
    Clear ThermaTex bubble cover
    Manual vacuum

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