The Growing Media is an essential part of any hydroponic growing system. Simply put, the growing media is the soil substitute. There are many types of growing media available, each offering different advantages. These media are all inert, sterile substrates that have excellent aeration properties.        __________________________________________________________________  rockwall plant cubes complete with insructions. 24 x 1" cubes  £3.95 77 x 1" cubes  £6.99                ______________________________________________________________________  rockwall large cubes 100mm complete with insructions 6 x 100mm cubes £4.00 12 x100 mm cubes  £6.50               _______________________________________________________________________ For more growing media go to  " growing media "