Hey yamaharider73. I think it's the tolerance for hijacking that makes 3reef such a great place! We don't really consider it hijacking here, IMO at least. A thread isn't a thing so sacred that leaves no room for questions along the way! If I had to do it over, I'd consider using a 30" long tank instead of the 20 Long, which is 24" long. I'd have to hang the motor on its own pedestal off the stand, but that would afford me the ability to build a refugium into the sump. We'll see how it goes. I prefer the carbon that Tangster sold me, although I don't recall the name. This is one area where I didn't really get into the science and numbers per se; and just trusted Roger's advice. The carbon he advised has served me well. I think with any carbon, though, repeated rinsing is a must, and even then--it takes time to get the resulting fines out of the system. Look how black my skimmate is! I'm confident a lot of that is carbon fines. Same here, Kevin. I have some fines in my sump too, after rinsing. A filter sock IMO is a good method if you don't mind the maintenance. It polishes the water beautifully while allowing you to not have to mess with filter floss anymore. Of course, they have to be cleaned and replaced periodically.