It's one or the other... areo or a rooting medium... not both.
Dirt, I love rapidrooters.
IMHO aero is more trouble and expense than it's worth... I mean, if you;re going to an aero system obviously it's lovely but between spending $300-400 on an ezcloner and all the crap to run it, and $40 on a tray, a heat mat, a bottle of clonex,a nd a sack of rapidrooters.... hmmmm...