"Floaties"

Hi all,

I wanted to know what kind of filtration you use on your tank.  The reason I ask is we have a 75G fish only setup, with overflow, a wet/dry sump, and a protein skimmer and we always have little particles floating around in our water.  At first I thought that they were bubbles, that's how small they are.  I look at pics here on the forum and in tanks at the stores and no one else has them. 

Sweet!  A filter sock, don't have one of those yet.  That's the kind of answer I'm lookin' for! 

For clarification - some of the "floaties" may be micro bubbles, but the vast majority are definitely not.  I think they're stuff kicked up by my diamond goby.