I dont use a Sock, my Sump has the usual over under over configuration. Between the 1st over and under, I made a tray that covers the width of the tank and fits between the two baffles. In this tray I use filter material. I buy the stuff from Walmart $2 a bag (batting material). I load it up in the tray and pull it out in about 3 days. I do this a couple times per month. Easy and cheap. Yes it does catch some pods, it also catches a lot of Dirt.
I love it, and you are correct, the tank is a lot cleaner because of it.