McLumpy
Aquarium Advice FINatic
I use Tetra Bio Bags and have had no problem adding new carbon to old filter media in my canister. After treating my tank with meds, I just rinse out my old media, (in used tank water from the pwc), open them up and pour in the new carbon, then stick the media back in the filter. This way I can keep good bacteria circulating through the filter and tank.
Other ppl may have a different method, but this way works for me.
Other ppl may have a different method, but this way works for me.