even a broken military clock is right once a day! lol
anyways, as cecil and other's have mentioned, you need biological filtration, basically, surface are for bacteria to grow on.. i'm using three "half" ibc totes full of gravel for biologic filtration
you could probably put a couple of 55 gallon blue barrels in series and fill with something like matala matting (i use floor buffer pads) and bird netting...
