Is this seedling healthy

Hey guys, does this seedling look healthy? It’s an Ilgm gs cookie auto. It looks like they’re turning yellow in the center. I just can’t figure out what would be causing it. I have a spider farmer 4000 set at 80% power at 43 inches. PH water 6.7. I haven’t added any neuts, just happy frog soil with 25% worm castings mixed in.

they are not turning yellow, they come out yellowish and turn green over time. That size grow bag with happy from will feed that plant for quite some time. as long as you don't mess up the watering, I think you'll be fine. Them bags tend to dry out faster

Oh ok great. Thank you for the reply. It was driving me nuts.