Reliable ppm chart for marijuana??

Discussion in 'Hydroponics / Aeroponics' started by Merlin85, Jun 4, 2009.


    Dumme Well-Known Member

    I would say, test your testing equipment.

    CobKits Well-Known Member Rollitup Advertiser

    fwiw i had been using oakton tds meters for decades and finally got around to calling them to get a definitive answer on what factor they use. they say every oakton meter that has ever been is 0.5 scale. i couldnt find that published in any of their literature
    SCJedi and sanjuan like this.

    Diskokobaja Well-Known Member

    Its ftom the box calibratet... i have turbo high hard tap water..

    Dumme Well-Known Member

    Again, I would say test your equipment, as they sometimes come DOA and miss-calibrated.
    Budley Doright likes this.

    Diskokobaja Well-Known Member

    I hear what you saying tho..

    bckushman Member

    I'm gonna add somethinh others seem not to have. Different brands of nutrients will have different appropriate ppms especially depending on what your using. I'm running seedlings at 700 right now BUT this is because I use an assload of beneficial microbes, and enzymes to prevent slime.(I run aeroponics) plus some sugar to feed to microbes.
    With this I'm actually using less than 1/4 strength base nutes and 3/4 strength rapid start, and 1/8 strength cal mag(you always need at least a bit of cal mag if you use an RO system)

    Also if you have a ro system remember to sterilize it regularly. Theres quite a bit of data proving virus's and bacteria build up in filters; in tests where people drank ro water vs. tap water more people drinking ro water ended up with nasty gastrointestinal diseases
    Altered State and Budley Doright like this.
    Altered State

    Altered State Well-Known Member

    Hey Santos , Its my understanding the .05 scale is used in North America with the .07 used in the Eu ?
    Budley Doright

    Budley Doright Well-Known Member


    tonetino Member

    is it possible to get a reup of the chart? Thank you!

    Beachwalker Well-Known Member

    I start them around 440ppm, heavy veg them 900-1100. Transition nutes at 1100 PPM, I run my normal flowering plants about 1100 and my heavy feeders about 1400PPM hope this helps, good luck!
    Budley Doright likes this.

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