So this is the filter I am stuck with for now...i am going to upgrade to an eheim canister filter within the next couple months. Is there any way to mod the TW because the only option are the carbon filters and I really dont see the purpose of carbon except to remove meds. I have already replaced their "bio scrubber" because I much prefer foam to some plastic thing. Its not like an Aquaclear where you can easily substitute other medias. Any thoughts?