Hey y’all!

So my seedlings don’t seem to like the plain coco so far lol.

They’re working on their first set of 5 fingered leaves, and the oldest leaves are starting to yellow…

I’m afraid to feed them too much, but if I’m feeding at like 425-450ppm, and they’re still yellowing, maybe I should go heavier…

Just looking for some guidance with seedlings in coco!

Running new millennium secret sauce, but diluted down to 450ppm from 1100ppm.

Thoughts?
Advice?
Experience?