Alien Aero (4 TO 48 Pot) 30L Pro Silver Series The Alien Aero {4-to 48} 30L Pro Silver Series uses the air culture technique to allow for more control over the root zone. A powerful, but silent water pump delivers the nutrient solution to each Micro sprinkler located under each lid. You can adjust the time and frequency of feeding to meet the specific needs of each plant species. Because the plants are suspended in the air, and roots aren't trapped in any medium, harvesting and crop rotation are
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