HELP- Yellow Leaves, dying leaves. Pic Included

[stephan420]

Hey Growers,
I would like to ask, as I am a researcher on plant biodiversity, what seems to be the problem in the photos provided. It seems that from the studies I have done, the cannabis plant is truly a unique and a certainly fun plant to research about. My thoughts about the issue presented in the photos below is nutrient deficiency, which I would believe could potentially be caused by a high or low PH within the growing medium. However, as I am very new to this beautiful realm of cannabis cultivation, I would really appreciate it if someone took 2 minutes to lay down their opinion below.
Kindest regards,

Growing Medium Coco Coir with a slight amount of soil.
Nutrients : Terra Aquatic Trio By GH,
PH of growing Medium 6.0
Temperature 30 degrees Celsius
Humidity 40%
Have a Great day!

 

[Farmer88]

How often are you watering?

 

[Ponky]

If only those lower leaves have an issue and the rest grow in fine. I wouldn't worry.

 

[stephan420]

How often are you watering? Around a Liter a day, according to the moisture of the coco coir

 

[stephan420]

I thought it be better if i tackled it bu there seems to be no problem, thank you for the reply