The only good thing I heard about this method was its good for aeration. Whats that mean? lol for air circulation?
Im guessing that they are talkin about aeration to the root system.....
so then why would u wanna filter the drainage water? i dont see the point unless u plan on drinking it? lol jk
im gonna need one hell of a filter to filter drainage water and drink it, charcoal just isnt cuttin it brother