I can't think of many reasons to just use that medium, then again I am no expert. I would say that the roots are not going to really like changes to harder material when you transplant but I am sure it can be done. I would assume Perlite and vermiculite would be a good mix and try for a gritty sandy texture but not sure about using a medium which sole/main purpose is to help drainage. One thing this color blind guy can say is that the color of your plant is nice. Never used one of those tents like you have and I will be following your grow a bit to check it out, looks nice and tidy..
