You could just build a "standard" AP system with a gravel grow bed. From there you can just throw some vermicompost into the gravel, spread it around and such, and go about your business as normal. YOU will have to find the right balance as no one probably has any idea on a way to calculate input/output parameters. However, it will likely pass the "smell test"; meaning, if you put too much it will start to smell in the grow bed. For all we know there's no way to get THAT much in there, but considerations will need to be made if solids reach the siphon. In all likelihood, you will mostly need to input the compost at the furthest point from the siphon. A long thin grow bed would work better for this. ANYWAY, yea go post in the other section. You got me interested now!Originally Posted by Cooper'sConcessions