Please Help, what caused this?

[suave615]

Okay so my leaves are turning yellow/brown and look really dry. Please any feedback will help.
I using FF Ocean Forest, so could it be nutrient burn.
These plants are close to 3 weeks old so the two small ones are definitely small.

 

[rillos]

Need some info. What kind of soil, nutes, lights, strain, and PH. PH is the most common problem.

 

[suave615]

Ocean Forest
No nutes yet
400w MH 12" away
Afghan Kush White Russian
Not sure of PH

 

[Blueballavngr]

Ph lockout on zink, cal, & mag. This would be my first guess. Can't be sure without ph readings tho

 

[rillos]

You really need a digtal PH tester. Without that you are just flying blind.

 

[devils letuce]

yes i agree ph meter is needed . u can get a cheap yellow one off ebay for 10 bucks , just grab some 7.0 calibration fluid also .