AsNoriuanswered grow question 2 years ago They are very droopy, owerwating droopy, then ph swings could start inside of pot. That would lead to lockouts, deficiencies and etc
If they are just watered and sprayed, then i would not worry, that leaf could have some mechanical damage and he is very far from light, some dont make it naturally...
Your humidity should be WAY higher
Fish mix 4 ml ???? I kicked him out, had burns and lockouts even with 1 ml max.
Could be calcium lockout ... But could be just lightning looking at all week ...