So to feed both trays, i would need 2 pumps right? i was thinking about doin that but Im worried about drainage of the top shelf.....since im going to have a light mounted under the top shelf to shine on the bottom i cant have the waterlines go straight up and down, do you think this would be a problem? It def would be nice to not have to make sure i watered them daily if it was automated. I have a 2x4x6 tent in the closet and was going to seperate it into two levels. My mothers are in a 2x2x4 cab. As money is always an issue i cant afford to have 2 seperate ebb and flow tables, but if i had 1 rez than that would save me some $$$