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Thread: is it possible to use too much R-0870 DPD powder?

  1. Back To Top    #1

    Join Date
    Jul 2012
    Location
    Herndon, VA
    Posts
    419

    is it possible to use too much R-0870 DPD powder?

    is it possible to use too much R-0870 DPD powder? As in, if you use too large a heaping scoop, will that affect the FC reading, making it higher than it actually is?
    8,000 gallon, in ground, fiberglass pool with a cartridge filter.

  2. Back To Top    #2

    Join Date
    Jul 2008
    Location
    Seacoast, NH
    Posts
    248

    Re: is it possible to use too much R-0870 DPD powder?

    No.
    19,000 gallons, Well Water
    Stay-Rite System 3 Cartridge filter
    IG vinyl, MasterTemp 400 Propane heater
    Intellichlor 40 SWG, 2006 Taylor Test Kit with Speed Stirrer
    1.5 HP Pump

  3. Back To Top    #3

    Join Date
    Jul 2010
    Location
    Philly
    Posts
    332

    Re: is it possible to use too much R-0870 DPD powder?

    No but you can get inaccurate results from adding too little powder. A good rule of thumb is to add enough powder so that there's always a little bit of undissolved crystals on the bottom after that first initial swirl.

    Real high Chlorine levels need a little more powder so that there's some undissolved crystals left on the bottom.
    Bill
    18'X4' 7600 Gal AG
    3/4 HP Pentair Pump
    Hayward S166T 100 lb sand filter

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