I have never used filter socks unless I am doing maintainance. They cause more trouble that they are worth. If you have a good skimmer, it takes care of the excess. Maybe is all the sponges and socks is where all of the nitrates come from. Also why would you put traps for your beneficial organisms like copapods, that is what a sock basically does. Some of the most impressive systems I have ever seen had no mechanical filtration of this sort, just a good skimmer and refugium.



