need some help with my seedling

Hey everyone and thanks for taking a look at my post. I am very new to growing and I'm not sure what I have going on here. Seems that they all have really light green leaves with a yellow leave base. Ill show some pictures. one is looking really bad though same color droopy with bad leaf cur. They are in coco withvery light nutes. I use flora series and cal mag with ro water. One is in a dwc bucket, it looks ok still kind of yellow though.

I might not be any more experienced than you but I think they look alright, maybe up the nitrogen a bit to green them up a bit.

Water less and don't feed them yet. The big ones could take a 1/4 strength feed in a week but that's it. Let them dry out in between watering, it builds a stronger root system. Other tan that they look fine.

Why do a dwc and know nothing on growing mj?

Thank you for your input. I will let them dry out and give them plain water. I'm definitely no good at this and still learning everyday. The dwc is for fun just trying new things.