Yellowing hybrid. Need some advice please.

Its some organic soil that's not very hot anymore, pearlite and coco. Equal parts.
I flushed it and gave it a dose of N. I have another auto flower that is flowering and is a nice green, but this guy is being weird. Growth stopped for a few days. The under leaves have begun to grow again, but not very fast. I gave a bit of coffee grinds to lower ph. Any comments? 400w hid. Thnks homies.

Here is the autoflower.

it needs nutrients man. not much more to say. if its organic grab some organic nutrients.

I'm good at burning my plants so thnks for the advice. I hit it with some organic grow. Will repost in a day or two.

moisture stress..

Its looking better. I'm going to let the soil dry out a bit to get some oxygen to the roots.

dammn man kinda looks like what started happening to my plant, i noticed on mine when the single bladded leaf started turning yellow i needed some food, so i bought some stuff called "sea-grow 16-16-16" all organic and let me tell you this shit works wonders bro. and my plant loves it soo Much, so if i where you id look into getting some food for her. Also make sure your PH is around 6.2-6.5 alot of the time growers think its a nitrogen deff. but it could also mean your ph is off making your get the yellowing but then again im just saying, id feed her and make sure your PH is right/.