what medium and container to use during Veg?

[LOC NAR on probation]

Get some 3 inch net pots cut some holes in a tote lid add air stones and you got a dwc tub to veg in! Recommend getting a shallow tub. just put the rooted clones in the net pots with some hydroton, and BAM just throw them in your flower when they're ready

That's what we do. Could not have said it better. Just about the same setup too.