Other than being a member on R2R, I'm a member to Waterbox's Facebook group and I've gotten a lot of suggestions to switch out the filter sock for my tank and instead use a filter media cup with filter floss/wool? What is this and why do people recommend it instead of a filter sock? I thought filter socks were good at getting bigger particulates and were pretty good as mechanical filtration? You can also wash them out and reuse them, right?