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Thread: How accurate must be DPD dipper amount??

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    jwfrank's Avatar
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    How accurate must be DPD dipper amount??

    Its hard to measure exactly one dipper because of the granular nature of the powder

    In another forum, our tireless expert Chem Geek wrote that the precise amount is NOT IMPORTANT
    QUOTE
    ........you just need to add enough powder to get a decent color. Any extra won't require more drops. Think of the powder as a dye (which it is) -- you need enough to see the color, but the dye is just indicating ANY presence of chlorine while the drops are removing chlorine so having more dye won't matter since it still won't show any pink if there is no chlorine left (because you've titrated it all away).
    UNQUOTE

    In fact, after I read this and tested using one dipper and two dippers, the difference was only one drop to get clear liquid.

    This seems of interest to many because it means we can use 1/2 as much DPD powder.

    Can someone re-confirm that this is correct?

    Thanks

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    Richard320's Avatar
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    Re: How accurate must be DPD dipper amount??

    At least two of us here have gotten poor results from skimping on the powder. It's discussed here. I don't use two scoops, but I make sure I use a heaping scoop and it's a pretty deep pink with a few undissolved crystals before I'll start counting drops.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
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    JasonLion's Avatar
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    Re: How accurate must be DPD dipper amount??

    Adding too much is just fine, within reason. You can use too little and have problems. How much is too little depends on what your FC level is. Higher FC levels require more powder.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    Re: How accurate must be DPD dipper amount??

    I've found you need a dark pink to get accurate results, just like Richard has observed.
    14,000 gallon IG, Vinyl. Hayward 3/4 hp superpump, Penatair IC40 SWCG, Pentair automation, Hayward sand filter, Aqua Comfort heat pump, Hayward 400k Lo-Nox LP heater.

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    jwfrank's Avatar
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    Re: How accurate must be DPD dipper amount??

    Thanks

    I will "downsize" from two scoops (which i thought was recommended) to one "heaping scoop" - and save some money in DPD

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