My biggest plant has started looking a little sick, have a feeling it may be some type of nitrogen toxicity? Maybe it’s just got some nute burn? I have flushed it out and will leave it be for a few days and hopefully it perks back up
Your soil is not perfect for growing cannabis and is stealing calmag like coco i think.
Also with led plants eat a lot more of calmag,just give her some of it and she will be great 😊✌️🏽