I have two walls. Each wall has 3 flood tables(2'x8') as shelves, one above the other. The first shelf I believe is 5' high and the last shelf is 12' high. I have a 115gallon res below the shelfs and want to set up a flood and drain system so all the shelves can self water and flood back into the same res. I already made the system but I'm having problems with pumps. No pump at the hydro store will go higher than the first shelf. I went to harbor freight and bought a 120$ sump pump with 25' head height and it will do the first two shelves and barely trickle out of the highest shelf. Here's the deal, I'd like to connect one single pump for the entire building aka both walls. Is there a simple way of doing this? I cant imagine, for such a small setup, just because I'm going so high I need to buy a 300-500$ pump which probably takes 1-2k watts everytime I feed? I see some pics of vertical farms with 10-20 racks high of flood tables, do they have a million dollar pump to get the water to the top flood table or is there a better design for vertical growing rather than having a res and pump at the very bottom of the system?
