1. Hydroponics
the cultivation of plants without soil ."

2. Commercial Hydroponics Systems

16. Homemade Hydroponics Systems

25. Hydroponics Growing Mediums

26. Clay Pellets

27. “Grow Stones”

28. Rock Wool
Very popular medium made from melting igneous rock and dripping it onto a spinning disk to dry (like cotton candy). It's readily available but somewhat dirty and it produces a dust when first setting it up that cannot be something you want to breath. It also comes in grow cube form.

29. Hygromite
A silica based mineral rock that was kiln dried into small stone size pebbles. It is 100% organic and not too expensive but, as a downside, must be rinsed to clean the constant dust it erodes.

30. Grow Cubes
with names like Oasis, Jiffy 7 or Jiffy 9 these are made from compressed fibers of cocoa, wood, peat or rockwool just to name a few. They have excellant water retention and are used for propagating seedlings from seeds. The seedling and the entire cube can be easily dropped into a hydroponics system as is when ready.

31. Make Your Own Growth Medium
Sand, pea stone, gravel, saw dust, etc…

32. Hydroponics Nutrients

35. Make Your Own

38. Compost Tea as Nutrients

39. Make Your Own