Just use rock wool or hydroton pellets as your medium. The net pots and the medium will be suspended over the water line, but will get a nice mist of water as the bubbles break the surface. Just cut a hole a bit smaller than the diameter of the pots so that thwey won't fall through, then just fill with water and nutrients. Make sure you got a good amnount of bubbles going, i use 2 smaller air pumps on 2 separate airstones in each bucket of mine. so even if 1 fails its got a backup, Ive had them fail before, its not pretty.
