Quote Originally Posted by Romeomffn View Post
There's also filtering it through sand. Wish we were finally at our permanent location. I'd love to build a green house like what you've done there.
I'd suggest the same, all the gunk will be filtered. A layer of gravel on the top and coarse sand on the bottom should do the filtration for you. A cheaper method is of course broken bricks, a layer of finer pieces on the bottom and coarser ones on the top.