If you are asking if a huge root bed is normal, then for a hydro setup it is completely normal. I would be confused to hear of something different.
rnf232s Reviewed by rnf232s on . Am I growing alien plants? I just harvested my first hydro crop. The roots were so dense they filled up the trays almost solid. It looks like a felt pad, about two inches thick, 2 feet long and 6 inches wide. Is this normal? I am drying them out in the sun to see what they look like. Rating: 5