lw: Cool..... americanagritech makes some cool systems. I so wish I could just buy one (tested and working). But to fit the layout I need (room shape, vertical grow, etc.) I have to take one of the commercial designs and bend it into the shape/configuration I need...........suuucks. I always use an airstone in the reservoir, thanks.

Ziggy: after studying the Waterfarm manual closely I can see how it works, no recirculation, and how the mysterious drip ring works.

If you ran those drip rings with a water pump I'm trying to figure out how many gph pump you'd need to run how many rings. Or in other words what the approx. flow rate of a ring is. Like would a 50gph pump run 10 of them?