Planting materials that will be used in the plant in this control system should not collapse when used for a long. No degradation of chemical and biological Plant roots can spread and. There is no substance that is toxic to plants, mix. Does not react with nutrient solution? Exchange of low or no charge at all. To prevent affects how much of the nutrient Not as the source of disease and insects. And reused easily. (39/2547 (2004), success)
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