5 week Fire OG and plants very sick and yellow

[Adam1212]

https://imgur.com/a/CSQFO

Im on the 5 week and nugs very small and plants like in the picture please any suggestion?

[D.A.A.S.69]

Morning Adam, yeah, can you tell us what kind of light your using,? How far away is the light from the plant ?
Are you checking ph? Both in an out ?What are you growing in soil or coco ?
Anything you can add will be helpful.
Like when did you first notice the damage ? Was it right after feeding them ? Stuff like that.
Nice plants, I know you want to get to harvest.