Review on Aqueon ProFlex 200 Micron Filter Bag, 2-Pack: Superior Filtration Efficiency for Crystal Clear Aquarium Water by April Smith

I have a ProFlex pan that uses these socks. I've been using them for many years now and they're really great socks. but I agree with the other reviewer. These socks clog easily, but other than that they work great. I don't usually reuse my socks, I change them once a month if I don't notice the sock getting too dirty. I often like the sock design itself, I put a carbon bag in the bottom. They're also great for your top hose as they filter out contaminants before they reach your display tank.