This is the firth version, system (not free) in other site are last version.
You need a 5 liter water bottle, plug in an aquarium air pump 2 Watt is good, put in clay balls, fertilised liquid (in all garden shop)
It's automatique, no need suveillance.exept for the liquid 2.5l, you must change it every week..
Use dark bands around the bottle (for the light), and abs to print the 3 things (4 soon): pla is eated by water in the time.
You can put an economic lamp for winter and programator (no need to drain all the time...)
Photos explain fabrication, no problemes for explications...
Look at the pictures...no problems for question....(but my English is bad....)