Hey I grow all my plants this way. I start in Rockwell, then transfer over to clay peddles. I keep them in rockwell only until the tap root is coming out of the bottom of the Rockwell. Once it is coming out of the bottom, I then move her over to the peddles. I make sure my water line just touches the bottom of the Rockwell so the root can really take off downward. I make sure my air stone is going at about half power for the first bit and then turn it up.
Hope that helps and happy growing