Hello; For many years I used some carbon in my filters. I also would bake it in my home oven from time to time. I now know that it cannot be "recharged" to the initial state, but all was not lost or wasted. Rinsing the used carbon and then baking it would cook off much of the trapped material. Even thou it no longer had the capacity to "adhear contaminants", it did make a decent biomedia being porous and with a lot of surface.
Hello; I agree with this. Useful for specific things like scrubbing mediaction on occasion but not a regular thing.
Good luck
