yeah ur gonna have to use grow rocks as medium and if the roots are submerged u need to get an airstone with the air pump. best/easiest way to grow hyro right here. the rocks dry out in about 45 mins so i water every 30 mins for 15 mins works great, stay away from rock wool and that kinda medium with this setup it makes things difficult and complicated, u could run them 24/7 also but i think its good to give the roots a break. i see why u put the holes where they are