>>453171Murray uses a "Automatic Bell Siphon" system that he shows how to make the mechanism for. It goes into the plant tub. The pump will fill the tub up and the fill-flush thing will dump all the water once it reaches the proper depth. Then it refills again. This allows air and oxygen to get to all parts of the roots as well as water. Nothing sits in water that way. It is in the "DIY Aquaponics DVD (Aquaponics The First 12 Months And Aquaponics DIY DVD)" package if you are able to find a torrent for it or just buy it from his site (shown in pic). The device can be scaled up and down since it is just some pieces of pvc pipe and stuff from your local hardware. There should also be lots of places online showing how to make an "Automatic Bell Siphon".
