SOIL Odd coloration between veins

[melle]

Hi everyone, I have a plant that's about three weeks old, maybe four. She is under an HPS light on 400 the top of the plant is just a little over a foot away. The outer edges of the leaves curled upwards so I added a humidifier and it helped some but not 100%. Also the top leaves look good at first but then they start getting discolored in between the veins. I'll post pictures so if anybody has any feed back I'd appreciate it.

 

[DrPhoton]

Hey there, this looks like either a PH problem or boron deficiency. Whats your PH ?

 

[Bikerstonrr]

I agree, looks like pH problems to me. Check out this tutorial http://www.growweedeasy.com/cannabis-symptoms-pictures

 

[melle]

I decided to transplant it into a larger pot after I posted this and I gave it fresh soil. I don't have the right instruments to test the pH at this time but she is looking a lot better these past few days so it was the soil. Thank you.