I’m curious how often other members change out their filter socks. I use a standard 4x12 filter sock and change them out once a week. By day number five the socks begin to over flow but I let that go until day seven which is when I do my weekly water change. At that point I put in a clean filter sock and wash out all my media filtration as well. I’ve read it’s not the best to let filter socks over flow but my sump is very tight and they can be a pain in the ass switching them out.