I wanna make a ebb and flow system. i have a closet im using its about 2.5 feet deep 5 feet long and six feet high how many plants do you think i can fit in there? i am going to use a rubbermade tub for a resevoir and not sure about the tray yet see wut wal mart has lol i wanted to use a fish tank pump but was told to use a submersable one any opinions? Thats about it i have never done this before so any help would be good thanks guys!