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)
Not react with the nutrient solution. calculate low or no to not expose the impact of nutrient ions. a source of disease and insects. The back is simple (Itti harmonious, 2547)
charge exchange low or none at all. to not to affect the charge of nutrients. is a reservoir of disease and insect and bring back with ease, (ithisoonthorn 2547).