A link for this system, based on the “Kratky” paper from Hawaii, is found here:
https://www.youtube.com/results?search_query=kratky+aquaponics
It’s called, “A Suspended Net-Pot, Non-Circulating Hydroponic Method for Commercial Production of Leafy, Romaine, and Semi-Head Lettuce.” I cover it more in the first 10 minutes of today’s podcast: