I was running one on my 240g. It would get dirty in like 3-4days.(packed tank) I got tired of switching off the dirty one with a clean one. then just rotate with them again(cleaned aswell). Now i dont run it at all. I dont see a huge difference. Here is my ugly pce
I would say run one or the other. I don't run W/D, never have, but I have 4 filter socks on my 540. I change them out once a month. If there's something easier than that, I'd sure like to hear it.