Can you take a picture in natural light
Can’t tell anything in that light. Please takea pic in natural lighting.
What type of nutrients are you using? And how often do you feed them?
Also are you checking pH? Both of the nutrient mix, and the actual pH in the soil at the root zone? The pH is often one of the main reasons for nutrient problems.
~MacG
Everyone here is more than happy and willing to help. When it comes to a deficiency you have to provide us as many possible details as possible as everyone above was requesting and asking for.
If you can take the time to fill out the below suport ticket I’m sure someone like @garrigan62 ight also be able to diagnose. Happy growing!
COPY/PASTE the below list into your forum post.
Answer these simple questions the best you can.
If you do not know, or do not use something; Just say so = NA
Strain; Type, Bag seed, or NA
Soil in pots, Hydroponic, or Coco?
System type?
PH of runoff or solution in reservoir?
What is strength of nutrient mix? EC, or TDS
Indoor or Outdoor
Light system, size?
Temps; Day, Night
Humidity; Day, Night
Ventilation system; Yes, No, Size
AC, Humidifier, De-humidifier,
Co2; Yes, No
If you can, upload a picture of your plant. It helps the diagnosis, if needed.
Add anything else you feel would help us give you a most informed answer. Feel free to elaborate, but short, to the point questions and facts will help us help you 
Thanks!