Comment to 'Anyone know what these spots are caused from'
  • It's definitely a Ca prob, but why is it happening, that's the question you need to answer. Start checkin PH, EC, but mainly your notes. Ca uptake is dependent on RH too .  Kinger is right on when asking for a bigger pic too. Don't be afraid to flush if needed !! 

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    • The humidity in my house & tent always stays around 30% and I usually use coco coir but I have only seen cal def twice in the last 4 years.

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