Not much to add, a lot of good advice already given. so bottom line clean sock at least weekly if not more. I you decide to run the carbon only a few days a month, make sure you discard after use. do not reuse same carbon. If you dose your system with trace and minerals, you can run your carbon 24/7, and if not, the other way is done by many hobbist also. read all you can on carbon, what it does and dosnt do, decide what you are trying to do and if carbon will accomplish it for you use it for the amount of time needed to get the results you want. so if used only a few days each month, dose minerals and trace after removing the carbon, and if 24/7 dose trace and minerals to a set schedule. There are different camps on this issue and I can agree with each depending on what you are trying to accomplish. Keep us posted on your progress.