We all pour our spent
nutrient solution on our soil plants, I cant think of a better use for it. After looking at the diagram
http://www.hydroponicsonline.com/for...ion-system.jpg, I'm a bit confused as to why there is a need for a secondary reservoir? Is it because the tubes with the plants in it will be below the water level in the main reverser. Also what helps solve pH fluctuations/nutrient deficiency is a larger water volume, not how the water is delivered to the plants. Unless of coarse it's a non recirculating system (drip to waste), then water volume wouldn't mater.