This is the whole set up of substrate, etc that hangs into the deep water culture. Basket, plug the plant rooted into from a seed, and the foam sponge stopper (get these at the hydroponic stores online) to secure around the stems. Plant is secure and baskets slides into hydro set up (tan planter w rubber maid top).
Hydroponics is a method of growing plants using mineral nutrient solutions in water, without soil. Plants can be grown with their roots submerged in mineral nutrient solutions, or in inactive mediums such as gravel. http://www.farmhydroponics.com/hydroponics-store/grow-tent-kits
My husband loves it when I garden, but with the time of year, it makes it difficult to grow anything. He started talking to me about going to a hydroponic store and start gardening that way. It is one of those things that I really would not mind doing, but I do not know where one is in my area.