I have a hob filter that's been running for 2 or so weeks. It gets rinsed and swished around in the tank during water changes. The filter bag is filthy because all my mollies do is eat and poop lol. Should I use the old carbon with some new carbon in a new bag? I could keep rinsing the old bag but it's brown and used looking. And a new filter on top of it will only worsen the clog problem. I'm changing the bag regardless but need to know if I should keep the carbon and add it to the new bag? The overflow tube is draining into my tank so I don't want to wait much longer to swap things around. I'm also adding a sponge filter when it arrives in the mail.