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What can be used as a natural pH up substance for my medical marijuana plants water? I have them growing in soil & have been using citrus powder to lower my ph.

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  • Define "natural"
    – JohnFx
    Sep 20 at 22:35
  • Are you trying to make the water more acid or more alkaline?
    – kevinskio
    Sep 20 at 23:59
  • please clarify what you are trying to do,PH up or PH down.and please post the PH and hardness of your tap water. Sep 21 at 4:03
  • look for "cal" at a mexican grocery store; fine white powdered calcium. ashes (wood/charcoal) are a strong base as well, though you will need to filter the mixture if you're growing them hydroponically.
    – dandavis
    Sep 24 at 6:21

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