From a guy who has been doing this for 30 years, no socks only a passive blue bonded filter pad. Somehow, the methods of mechanical filtration have changed, from filter pad, to socks, to automatic roller fleeces. No doubt, the effectiveness of trapping detritus, uneaten food, and organics has improved. But for what? To trap the reefroids, phyto, PO4/NO3 boosters, and other micro foods you spent money on for your corals? I’d rather all that end up in the coral polyps, refugium, or flowing around in the display water where it can be used. If the nutrients and organics get elevated, then there are water changes, protein skimming, and yes a more effective mechanical filtration. Make sense?