dude make your own aero system!!!!!!!!!! its honstly so so soo easy to do.
first find a light proof container.( plastic light proof folgers container)
then buy a fish tank air system, the one that pumps air into the blue "rock", which makes alot of little tiny air bubbles.
then all you have to do is fill the container with water,poke holes in the lid, run the air line into the lid and down into the water..( use the center hole for the air line). then just add your cuttings into the other holes.
and walah you got an aero device
good luck
p;s change the water every other day, if not every day.