Ph Meter Calibration

Discussion in 'Sick Plants and Problems' started by stringaling420, May 9, 2014.

  1. #1 stringaling420, May 9, 2014
    Do I have to calibrate both 4 and 7? Or can I just calibrate it at 7 without 4 and be alright? I wondering if this is a issue or not?

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  2. #2 AugustWest, May 9, 2014
    you can just do 7 and it should be fine.
     
  3. #3 stringaling420, May 9, 2014
    Ok thanks

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