(18 different) 1/4" hoses running out of the res to the pot sites. The sprayers will be positioned 2 1/2 inches on either side of the net pots. This gives you all an idea of how it will set up. It mimics Earls 4" design. The return from the chiller will act as a waterfall. I can't wait to get this soil grow over with so I can move on to this......