Anyone that buys kits for growing are wasting a lot of cash. Black 5 gallon buckets a good tote 2 inch pvc and a real good air pump and water pump propper size grommets for the pvc, net pots for the buckets and if you can afford it a nice chiller. If you build your own system, you will be able to afford the chiller a lot easier. For many growers that use heavy lighting that can throw heat, the chiller is the heart of the system. I quit growing in water because my results with soiless peat and perilite are just as amazing as the rdwc if not even harder nugs that dont shrink to nothing.after drying. My ways is the easiest, less work way than anyway else. Work involved with rdwc is to much for me now. I just water and feed water and feed now. No cleaning anything except the leaves that drop from the plant. No emptying a rez to scrub out, no removing the girls from their home to clean their buckets. You also need a good 24/7 nutrient monitor for rdwc. All in all it is very expensive even feeding the girls is more expensive the rdwc way. I have 2 system I will sell now, with chillers. Enought for 10 in veg and 10 in flower