Upgrade time !

[HaZRaTTy]

Filter socks isn't a replacement for a Skimmer and Vice Versa.. I don't see any problem with the filter socks before a skimmer.

You'll have to be changing your Skimmer Socks.. Err wait Filter Socks most likely every week anyways.

Someone can correct me if I'm wrong but Protein skimmer's are used to take the Dissolved Orangic matter out of your water column which I don't think is being trapped by your filter sock. (Maybe to some degree)

I would like to think that a filter sock is more of a rough, water cleansing sort of filtration catching the big stuff coming from your tank.