I used filter floss in my 14g biocube. It can be effective and removing detritus from the water column if you can keep on top of replacing it. If you lax, it can actually end up being a nitrate source.
I rub GFO, Carbon, and does vinegar/vodka. I also use a skimmer 24/7, but that is considered mechanical filtration and not media. To polish the water I use a vortex diatom filter...hands down the best way I've found to get the tank ultra clear.