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Thread: test kit chemical R - 0870 DPD powder

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    test kit chemical R - 0870 DPD powder

    I recently obtained the supplement kit including R 0870, and R - 0871 for for FAS/DPD chlorine drop test BUT instead of storing at room temperature instead left powder (closed) on patio table under canopy not in sunlight for three weeks before realizing should have kept inside at room temp. Powder abit caked up but swirled and broke up any small lumps, does this out door exposure affect the integrity of the powder? Now keep it inside.
    Blue haven kidney style 16,000 gal gunnite including Spa, test Kit TF - 100
    Built 2000 deep end 7.5 feet, 2 steps at shallow end
    Original SWG then convert to chlorine
    Pentair Clean & Clear cartridge filter (4)
    Blue Haven Teledyne Laars Platinum II heater

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    Re: test kit chemical R - 0870 DPD powder

    What is the color of the powder?

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    Re: test kit chemical R - 0870 DPD powder

    originally white now has speckles of grey in the white powder but after mixing still predominately white.
    Blue haven kidney style 16,000 gal gunnite including Spa, test Kit TF - 100
    Built 2000 deep end 7.5 feet, 2 steps at shallow end
    Original SWG then convert to chlorine
    Pentair Clean & Clear cartridge filter (4)
    Blue Haven Teledyne Laars Platinum II heater

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    test kit chemical R - 0870 DPD powder

    I'm not sure what color it is supposed to be, but I received that powder which was once was white and next time gray/blue. I have some of each still, and I checked it and they both yield the same results. Not sure if this helps or not but I was wondering the same thing, what color is it supposed to be?


    ~14K gallon - AquaRite AQR15 SWG - pool Newly plastered on April 9 2016
    TF100 kit - STA-RITE SYSTEM3 Modular Media Filtration - Model S8M150
    Pool water supply from on site water well = CH of ~350 and TA of ~350
    Doheny's Discovery Automatic Robotic Cleaner/Pentair Model 011018 VS Pump
    Sundance Altamar Hot tub separate from pool / central Oklahoma

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    Re: test kit chemical R - 0870 DPD powder

    It usually still works, despite being exposed to conditions that I know you wont do anymore!

    Knowing that you have SOME chlorine in the pool, simply perform the test as usual.....same amounts, same everything.

    If your pool water sample turns pink, you are good to go (for a while). Ultimately, you will want to get fresh reagents.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: test kit chemical R - 0870 DPD powder

    The DPD powder starts out pretty close to white but immediately starts to darken. exposure to moisture hastens that process. I think Taylor suggest get rid of it if it is dark gray and clumps.

    On a personal trial, I have found it still works when it is quite dark but that's really when you should replace it. Besides, I can use the extra sales in refill money!!
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: test kit chemical R - 0870 DPD powder

    duraleigh,
    On the test kits it says to use a heaping scoop, can you tell me if there is enough to turn it pink, is that is a sufficient amount? All the other tests are so precise, just curious how much powder is actually needed. Thank you


    ~14K gallon - AquaRite AQR15 SWG - pool Newly plastered on April 9 2016
    TF100 kit - STA-RITE SYSTEM3 Modular Media Filtration - Model S8M150
    Pool water supply from on site water well = CH of ~350 and TA of ~350
    Doheny's Discovery Automatic Robotic Cleaner/Pentair Model 011018 VS Pump
    Sundance Altamar Hot tub separate from pool / central Oklahoma

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    Re: test kit chemical R - 0870 DPD powder

    best i remember three weeks ago was whitish not ivory soap white but with a little grey mixed in. went to calculator as test showed no FC and test did not turn pink, though it did a few days ago. added 128 ounces kem tek liquid chloride this am will test again in few hours thanks much.
    Blue haven kidney style 16,000 gal gunnite including Spa, test Kit TF - 100
    Built 2000 deep end 7.5 feet, 2 steps at shallow end
    Original SWG then convert to chlorine
    Pentair Clean & Clear cartridge filter (4)
    Blue Haven Teledyne Laars Platinum II heater

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    Mod Squad jblizzle's Avatar
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    Re: test kit chemical R - 0870 DPD powder

    You can not use too much powder, but you can use too little. If you get a nice pink which stays pink, not just a flash, then that should be enough powder.
    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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