A hydroponic nutrient circulation system comprising: a nutrient reservoir; a plurality of grow tanks; a nutrient supply system for supplying nutrient from the nutrient reservoir to the grow tanks, the nutrient supply system including a nutrient supply line extending into each grow tank; a nutrient return system for returning nutrient from the grow tanks to the nutrient reservoir, the nutrient return system including a nutrient return line extending into each grow tank; and a plurality of nutrient aeration and flow control, NAFC, devices, each NAFC device associated with the nutrient supply line of a respective one of the grow tanks, each NAFC device including: a nutrient supply intake to which the nutrient supply system is connected; an air intake to which the associated nutrient return line is connected; a nozzle in fluid communication with the nutrient supply intake; a mixing chamber in fluid communication with the nozzle and with the air intake; a receiver port in fluid communication with the mixing chamber and aligned with the nozzle; a bypass chamber surrounding the receiver port, the bypass chamber in fluid communication with the mixing chamber; and a grow tank supply outlet to which the associated nutrient supply line is connected, the grow tank supply outlet in fluid communication with the receiver port. a nutrient reservoir; a plurality of grow tanks; a nutrient supply system for supplying nutrient from the nutrient reservoir to the grow tanks, the nutrient supply system including a nutrient supply line extending into each grow tank; a nutrient return system for returning nutrient from the grow tanks to the nutrient reservoir, the nutrient return system including a nutrient return line extending into each grow tank; and a plurality of nutrient aeration and flow control, NAFC, devices, each NAFC device associated with the nutrient supply line of a respective one of the grow tanks, each NAFC device including: a nutrient supply intake to which the nutrient supply system is connected; an air intake to which the associated nutrient return line is connected; a nozzle in fluid communication with the nutrient supply intake; a mixing chamber in fluid communication with the nozzle and with the air intake; a receiver port in fluid communication with the mixing chamber and aligned with the nozzle; a bypass chamber surrounding the receiver port, the bypass chamber in fluid communication with the mixing chamber; and a grow tank supply outlet to which the associated nutrient supply line is connected, the grow tank supply outlet in fluid communication with the receiver port. a nutrient supply intake to which the nutrient supply system is connected; an air intake to which the associated nutrient return line is connected; a nozzle in fluid communication with the nutrient supply intake; a mixing chamber in fluid communication with the nozzle and with the air intake; a receiver port in fluid communication with the mixing chamber and aligned with the nozzle; a bypass chamber surrounding the receiver port, the bypass chamber in fluid communication with the mixing chamber; and a grow tank supply outlet to which the associated nutrient supply line is connected, the grow tank supply outlet in fluid communication with the receiver port.