Im sure it has been said but scrubbies are my favorite. I could have saved so much a few years ago when I made a sump for my 100 gallon and bought bio balls and ehi substrat
You need these... I am seriously surprised nobody else chimed in yet.
http://doitbest.com/Scouring+Pads-Do+it+Best+Imports-model-10044-doitbest-sku-632989.dib
cant you use those shower scrubbies/puffs http://farm3.static.flickr.com/2093/1955511195_bedcf6336c.jpg?v=0
was taking a shower and thought to myself these would make great biological filter media but never really put it to use