When we were setting up our 180g, it came with 2 socks. I wanted to set them up and my fish guy said not to because they get all gunned up with crud. We have since cut a pc
of egg crate to fit inside the sump and have a pc
of white filter pad attached with rubber band that we change with every water change. It gets crazy gross so I can only imagine what all your socks look like after a few weeks.
Also, on a side note for the knee highs...Walmart sells them 3pairs for1.00. They are on an end cap type thing in a gum all plastic shell (think gumball machine). My company makes them for Walmart, so I know about them. And they sell a whole heap load of the too!!!