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    Calcium deficiency??

    A few weeks old. Not sure what going on. I've added cal-mag. Maybe not enough. Looks like calcium deficiency to me.
    i use r-o water with 600 watt hps. Anyone else have any ideas?
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    #2
    It definitely looks like a calcium deficiency, if you’re using R.O water, it strips it clean of calcium, and it becomes a nutrient you need to add to the list of nutrients used.

    I’m not so familiar with the topic as I haven’t used R.O water or had a calcium deficiency myself yet, but I’ll included a link to GWE calcium deficiency page, and it will answer almost every question you’ll need to get her back to a thriving green state. Hope this helps some

    https://www.growweedeasy.com/cannabi...ium-deficiency

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      #3
      Yep, that looks like a Ca deficiency starting.
      What are you feeding them?
      WHAT???
      5x5 grow space
      900w of Vero's and F-strips
      4-17gal totes self-made UC system.

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        #4
        It does look like a calcium deficiency, what Ph are you feeding at? Calcium gets blocked out by low Ph as well as by high levels of phosphorus.

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          #5
          Like Chad said whats the PH

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