Been running filter socks, Becketts are still clogging every 48 hours. Too much work cleaning Becketts (although I can now do it in about two minutes total) so back I go to the old ETSS 1000 / Iwaki combo. Good thing none of you bought my skimmer when I put it up for sale. I ordered a bunch of new-style bioballs for the skimmer tower, maybe they won't clog as much. If I spend a tenths as much time maintaining the ETSS as I have the MRC, my tank will run great. 2014 Motto: EVERYTHING OLD IS NEW AGAIN!