Further to the discussions in the bioload thread I think I might give the following setup a try - soz for the drawing.
DWC is a hydroponic growth technique where the plant is held in as little growing media as possible.
I intend to use 1 or 2 chambers (not sure yet). The water is dripped in at the top of the chamber and allowed to "run" down the roots. The roots themselves as the plant grows will find their way to the bottom of the chamber where water is allowed to collect to a depth of 3" or so, governed by the height of the primary return pipe, and highly airated. The airation serves 2 purposes as it both provides air to the roots in the water but also creates alot of surface disturbance to assist with keeping the humidity as high a poss inside the chamber.
As a safety precaution I will stand the chambers in overflow trays themselves piped to return any overflow to tank.
The tank and shelf unit already exist (my PC room tank). I will have to empty the shelf above the tank as it's full of junk at present.
BTW the drawing is not to scale
Any thoughts ?