Looks like it may have a little nitrogen toxicity the leaves are dark and shiny but it’s not to big of an issue in the veg stage just going to not feed for a while.
Looks like it may have a little nitrogen toxicity the leaves are dark and shiny but it’s not to big of an issue in the veg stage just going to not feed for a while.View attachment 4837247
Those plants have nitrogen toxicity.
I know that mixing soil and coco is pretty uncommon and has caused a lot of heartache for a lot of people. I'd just stick to one or the other.