Not sure about the mix you have but my aero is set up 15 on 15 off. If it drains well then it should be ok. If you were using rockwool then that would be too much. Once a day or every couple of days untill they really started drinking. There should be some pics somewhere on here of over watering. Just make sure your stuff doesnt look like the pics and you should be fine.
The therory is to let the medium dry so the roots can stretch for the water. If they are constsntly water loggerd they wont reach out. And usually have a bad side effect like turning yellow and stunting. You dont want them too dry where they wilt and die either. You may have to experiment a little. Good luck. WM