I came across this project on Imgur:
http://imgur.com/a/yrkio?gallery
The pictures make it look pretty, and easy to assemble, but I suspect that in use you would end up with 4 inches of saturated mix/muck in the botton of whatever size container you used.
Perhaps if all of the plumbing bits were sealed, and the perferations in the black pipe were at the same level as the overflow, with the container mix in contact with those perferations, it would wick the water as intended.
It looks like a good start, but perhaps the design needs refinment?
Or, maybe stick with other proven designs.
Jim