I am starting a grow in a 2x2x2m tent with a 1000W HPS light. After putting the seeds into the rockwool and letting the sprout above, could I then put the rockwool directly into the 5 gallon bucket, under the 1000W light? (can be hung from 2m if necessary). The rockwool is cut to fit and it would have the 1 inch starter in it which means it would fit neatly (but not stuffed) into it. I am growing La Blanca if that helps.
I don't know what you mean about the rockwool, but you can either put your germinated sprout straight in to the clay balls, or put it in a small rockwool cube and when the roots have taken hold put that in clay balls