Sir Alex
Dragon the eel (below)
I have a bunch of little particles in my water and they've been there for quite a while. Over a month ago I completely drained the sump and removed this mud stuff that was in there. I didn't quite get all of it but at first it wasn't really a problem. Then for some reason my father decided that some stuff in the sump needed some "improvements". basically he completely stirred up the bit of mud on the bottom and completely clouded up the water (you couldn't even see out the other side). A little while before I removed the mud I did a water change and used some equipment that had been outside. I had a bunch of pollen floating around in my tank for like 2 weeks... That could be the problem but I doubt it is because I have a pretty thick mechanical filter (yes, I clean it often).