What Is Closed System Hydroponics? Tammy Clayton | October 10, 2017 [et_pb_section bb_built=”1″][et_pb_row][et_pb_column type=”4_4″][et_pb_text _builder_version=”3.0.79″ background_layout=”light” border_style=”solid”] It’s the exact opposite of traditional agriculture, and most forms of hydroponic growing are …