hi everyone im new to hydro ponics and was wondering????? wht way was best the pic with the pots in it then flood and drain top??? or the circles i roughfly drew just to give idea for you guys on cover with net pots placed in em and flood and drsin it that way also im a lil confused after you flood top contanier and then pump goes off how does the water drqain back down to bottom thru the pump? or do you drill drain holes?