Yellow leaf with brown

Looks like calcium deficiency on the right coupled with niteogen def on the left - was the pale yellow leaf from top or bottom of plant? Nitrogen usually starts bottom up. Suggestion: calmag & base nutrients.

Hey bro! Greetings... Most of the time this happens due to poor plant nutrition, in this case I see chlorosis and something important, your roots might be suffering... you could check them to get a more detailed view... Also, your plant is probably starting its flowering process, if so, start giving it a nutrient-rich diet with P K, as in this phase the plant demands these base nutrients... I would keep an eye on the watering, and decrease the humidity... and for its recovery, I would feed it "green explosion, top crop," "instagreen, grotek," "supervit, hesi," "alga mic, biobizz".... any of these will help you regain good momentum for flowering... you can look for a solution rich in seaweed/aloe vera/amino acids or similar! Cheers brother!