I have googled my eyes out on this and now must submit to the GQ masses,
I saw a show on a nature channel that showed a cascade of barrels that contained different foliage. Each barrel was a stage for purifying specific impurities and the last barrel was “purified.” Now, I can’t find anything to reference this show, design of this system, or any page out there.
I want to construct one of these myself, and I finally got my wifes permission to put it in the back yard!
Any help, pointers or references?
BTW…They didn’t have any of these in 1920…Leave it alone!