get some help please

Can anyone tell me my problem here I DON'T like the looks of ways happening. Someone chime in I wanna get this down. I had it on another grow and that plant ended up getting all kinds of frustrated last time. I thought it was a Mg. Def. But I don't know man I could be way wrong and end up fuckin her up. Some advice would be much appreciated!

clawing plant

to much nitrogen would be my guess but im sure to be wrong

i was thinking the same nitrogen toxic

What kind of soil and what and how much you fed it?

I'm growing in Coco, and now that people are saying N. tox. They r probly right cause I gave a little extra nutes thus time to experiment but I guess where I was at was pretty neutral. So should I flush it? And only give 1/2 strength wat I have last time, or should I start all over with easing 1/4 strength in? I'm growin in 1 gal. Pots so if I do flush should I mix nutes in with the second gal I run thru, or just plain ph'd water?