<a href=showthread.php?s=&postid=14836022#post14836022 target=_blank>Originally posted</a> by Whys
It's a matter of philosophy. Some prefer to let their cleanup crew and bacteria break down the detritus then remove the nitrates with water-changes, while others prefer to remove as much detritus as possible before it become nitrate.
If you aren't aware of an obvious problem, then you don't need a sock. You do need a skimmer.
<a href=showthread.php?s=&postid=14836705#post14836705 target=_blank>Originally posted</a> by Whys
^^^ You can and some have, but I doubt it's as effective. Pantyhose are more typically used to hold media like carbon, or flabby thighs. :]