Comin along well. I've never had an issue with root growth in bp. Everything ur plant needs is in that water ur feeding right up to the cube, including DO. U may have overwatering in dirt grows, as I'm sure u know, and wanna let the dirt dry up. But I have a hard time believing it could happen in BP or DWC, unless of course, somethin else is wrong with ur system. ( I.E. High res temps= less DO in water) let me pose a question, in DWC, do the Roots stop growing when they hit the water? Mine don't. Quite the opposie, they blow up! Why would it be any different here.