I am inclined to agree with Mr Head, for hydro when I did take clones I used an aerocloner, but for soil I always used those lil' greenhouses at walmart that are rectangle and come with a million soil pellets that soak up and get big in water...I would say go back to rockwhool since it's worked well before. But Mr. Head is gonna be a lot more educated on this...if you're not transplanting over to a location without a dome or often misting, the lack of humidity will surprise the babies for sure...