Okay... last week before my water change I noticed my filter sock clogged... after PWC, changed to new sock and in just a week was almost going to overflow (usually change socks once in 2 weeks) but was wondering how it clogged so fast, sock was not even brown yet! Changed to another socks and 3 days now and it clogged! To be safe, I switched to a media-bag/mesh sock yesterday and today even this is clogged!!! Took a closer look and all around the sock there's this hairy very slimy thing forming.... I usually wrap my return line with a media bag and even there there's this slimy thing... i felt it and its transparent and so gooey. My GFO reactor has water flow but no GFO tumbling cos this slimy thing is over the GFO too! Its not algae! I don't see this thing anywhere in the DT around coral or rock (just the media bag covering the return line), all of this is mostly growing in the sump where there's water flow and irregular surface. Can someone advise what this is and how I can get rid of it ASAP? I'm flying out of the country this weekend and very scared i'll have a major leak or a crash.