Leaves almost gone on one of my clones but roots are healthy

basically I under watered my clones 3 have come back but one of them is pretty bad almost no leaves left but roots look good i transplanted them into coco recently which is how I know the roots look healthy but leaves seems to be falling off little by little from when I under watered them. I have had plants that have come back from this amount of damage but I would like a second opinion.

Coco?

You watering daily with nutes?

Yes coco , only recently started using nutes ec 1.6 ,

Ya killed it by not growing properly in Coco