I'm in need of expansion...My first grow was such a success with my friends that I want to go from 10 to 50 at a time. Well my idea is to buy 12 foot lengths of 10' or 12' pvc and cut a hole evey 14" for a 5" net pot. I should be able to get 10 pots per length of pvc. I'm thinking of having a 55 gallon drum for reservoir and 10 gallon drain/catch with a pump that runs off a float, so I can keep the pvc as low to ground as possible, my biggest concern is for my roots (nutrient build up and root rot). Has any one used or seen this idea before? If so, how were the results?