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@TheIceCreamParlour First of nice work on this grow man! I have looked at the last 5 pictures specified in your comments and I see a perfectly healthy plant here that just need water to rebound. You mentioned some brown rusty patched on your fan leaves. This is a sign of nutrient lockout from PH severe fluctuations. This would also cause the dropping you see as the plant has not been able to take in water and Nutrients like it wanted. You also mentioned turning off a Blurple LED, was this recent added? Its very common to see underwatering effects take place after a new light is added without an increase in water feed. However if both your PH was accurate and the LED was not recently added then the cause is most likely due to its phenotype. Its just simply thirstier than the rest and all you need to do is increase its water! I hope I help resolved your issue IceCream please make sure to update us with some results! 😎

Hi @TheIceCreamParlour! Well, I just see signs of underwatering, plants look thirsty! Also, with such an overcrowded jungle, you better have a nice continuous airflow everywhere between the plants, lack of air circulation could lead to slow growth / slow flowering. Give them a good watering, make sure they all get a cool breeze, and you should be fine. Hope this will help, keep us up-to-date and happy growing 👊

They looks healthy to me. You can feed and water as usual