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Thread: DPD powder ( R-0870) has turned dark. Is it OK?

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    Default DPD powder ( R-0870) has turned dark. Is it OK?

    Powder turned dark grey/black during the winter.

    Is it still usable and accurate?
    Last edited by PoolDoc; 05-26-2018 at 04:00 PM.
    24,000g IG w/Pebbletech, Systems 3 cartridge, 1 1/2 hp 2 speed Hayward Superpump, Raypack NG Heater & Taylor 2006

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    Default Re: DPD Powder

    This is a common issue, so I deleted a somewhat inaccurate answer.

    Briefly, if you can get a pink color, you should be able to get a somewhat accurate reading . . . but dark, black, or hard reagent powder should be replaced.

    The the complete answer, is here:
    http://www.poolforum.com/pf2/showthread.php/26677

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