Originally Posted by
Tizzo
http:///forum/post/3084952
The micron bag is mechanical filtration. As is the skimmer.
But as mech says, none is really needed. You are running what's called the berlin system, pending you have adaquate live rock.
Live rock and a skimmer is really all a good healthy system needs.
The sock pulls out excess foods before they break down.
The micron bag is only to hold the carbon from floating around. A sock is for filtration. Put the bag in high flow area like the near the outlet of the return pipe. I dont beleive in socks because they starve the fuge of leftovers or get forgoten and cloged up becoming nitrate factorys.
Yes live rock and a good skimmer is all you should need in a reef.
Also If you run carbon dont let it sit in the tank more than a month after that they will leach backint to the system. I got 3 weeks to be safe.