Trying to understand my EC/TDS readings

Discussion in 'Hydroponics / Aeroponics' started by WillyWanka, May 16, 2018 at 10:09 PM.

  1.  
    WillyWanka

    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?
     
  2.  
    Airwalker16

    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.
     
  3.  
    Airwalker16

    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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