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Hydroponics: the growing plants without soil, but they still require medium and Hydroponics in. transactions online or local companies offer a wide range of culture media choice, and it is better to know, to the best choice. Different Growing Mediums Although almost all substances can be more or less serve as a culture medium, the most popular are: – air / water / sand / gravel – Vermiculite / Perlite – Lava Rock – Sphagum Moss / sawdust Wood – expanded clay balls called – Oasis Cubes – coconut fiber – fiberglass insulation – owner Soilless Mix – Rockwool Rockwool is true is the last in the list, it is definitely the name of the media as People increasingly use hydroponic gardeners because it is easy and comfortable. Rockwool was originally used as insulation material in construction. However, hydroponic gardening in Denmark was the first to discover its benefits when used as a carrier of culture. Today, the wool is very popular and commercially available in the form of cubes and plugs rockwool Rockwool. For the production of mineral stones and sand, and then fused together in various shapes and sizes, which are similar sounds, such as the manufacture of spun cotton candy. Cubes Rockwool Rockwool benefits (size 36 "light by 12" by 3 ") are very convenient to use because they can enroll in a form suited to your needs. This material is perfectly water and air, because they are very porous. Therefore, the roots of plants will be protected from decay and dehydration in case of default in the pump or other event long enough to correct the situation. Pellets and plugs rockwool held together very well and are easy to use no less. Unfortunately, rock wool and weakpoint precautions in addition to the advantages mentioned above. It can hardly be considered environmentally friendly because it is made of rock, and thus not biologically degradable, which require an effort to remove them. In addition, it is dangerous to human health, causing silicosis if inhaled accidentally. For this reason it is advisable to wear a mask with a HEPA filter and manage mineral careful. Another thing that a gardener should keep in mind as you rock wool, this material a very high pH, which should be available with acidic substances and reviewed regularly reduced. Despite the disadvantages of rockwool, it is so easy and convenient to use as it remains the most popular type among the gardener the hydroponic culture medium. The only thing to do is take the necessary precautions while working with him.