Yep, that's a good way as well. One thing I do is, when I stir up the tank and blow on the rocks, I throw some floss in there for a few hours to catch the crud.I don't use socks, to keep noise down I put zip ties around the opening, leaving the long section trailing down into the sump. Works for me and no extra noise. Lots of people don't use anything, it's all personal preference.