i hope u can see the pics right, but it can give u the idea to how it works,,
the yellow hose(pic 1) comes from the pump, and there is a plug at the end of the hose.(almost the length of the tray) then just add connectors to the hose, from there connect the smaller hose to make a drip ring useing a t connector(pic 2).
the water will run through the medium (i use hydroton) into the tray and bck to the res. the tray is a bottom from a rabbit cage, were i made a hole and put a drain in it(pic 2),between the tray and res i made a filter out of some filter mats for aquerium pumps.
the system can easly be extended by just putting more connectors in the main hose line,and or upgrade pump(i use a ehiem 600ltr/h)..
a very simple system and theres no moving parts, and if the pump fails, the plants can easly be maintained for a few days by hand watering, til the pump is replaced..
in the res i use a aquerium heater..
pls keep in mind that these pics r from my old system(first try on scrog and hydro)
the new system will be with a tray that is 100cm x 110cm and can hold 12 11ltr pots, useing the same pump and changing the hoses, which will go into a home made gro tent 120x120x140cm, but the basics of the system r the same..
ill pop some more pics if u like, batt in camra need recharging..
i hope u can use this for something or give u some ideas..
and sry for the bad spelling, havent writin this much english in a long time...