Yes its a purely hydroponics. Infact its kinda a DWC(deep water culture) mod. I heard that once it's showing the leaves after germination (very) light feeding can begin. WELL, I will wait for others to respond.
Its roots and air. So, as soon as there are roots, there will need to be food. Go gentle on it. I'd take a 55 gal drum of soup over that small aero rig any dayBut, I am rooting (jah!) for you to succeed! What a fun endeavor!
