First time growing. Nirvana Snow White and Northern Light, Bubbleponics

I am currently growing Northern Light and feminized Snow White from Nirvana. I am using the Stealth Hydro Bubbleponics system with the dual spectrum 65 lights. Pretty easy to setup. If I expand the number of plants I want I know I can easily duplicate the setup much cheaper now.

I know once the plants get some size they will be too crowded. But I hated not to get something in all 6 planters just in case any didn't take. So I will worry about what to do about crowding later.

This is day 9. I am using 1/4 strength stealth hydro micro and grow nutes. They look ok to me, but this is my first grow so I could be wrong.

Day 9 from germination.

um.. everything looks good, but one thing u should change is that the rockwools should be under the growing medium. the roots might grow out of those rockwools and see the light. or u can get a lid for the net pots.
light+roots=dead plant.

Im gonna have to stack some medium around them or something else. I already have roots growing 3 inches below the net pots so trying to remove the rock wool at this stage to lower them is too risky.