...Please don't misunderstand... I absolutely LOVE that you're taking an oooold technology, and applying it in a new way to solve some problems that we're all having!

I'd like to see a diagram of your overall setup (just to try to track exactly what you're doing), the better to understand how you're inducing the initial syphon, as well as to figg'r out how you're routing things back to the resevoir.

Passive hydro ROCKS.