Trying to understand my EC/TDS readings

Discussion in 'Hydroponics / Aeroponics' started by WillyWanka, May 16, 2018.


    WillyWanka New Member

    So I've just gotten my TDS and pH testers, and I'm trying to wrap my head around the readings.

    My tap water sits at a ph of 7.0

    My EC meter reads 42ppm and 89 uS/cm

    How do I apply that to determine the amount of Canna Vega A+B I should be using?

    I'm using the calculator found at the canna site (I'd link but don't have enough likes yet), but am unsure of what I should be entering for the water hardness value. Do I just leave that alone?

    Airwalker16 Well-Known Member

    Whatever the ppm would've been starting with RO water at 0 plus your mix and add 42. That will be your nute mix so just -42 from whatever you can subtract ffrom calcium and magnesium from your nutrients.

    Airwalker16 Well-Known Member

    Just know you'll need to subtract 42 from whAtever amount you need to hit your goal ppm as if your water was starting at zero.

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