rollin_22
Aquarium Advice Activist
i have a hang on filter on my 55 and am planning on getting new cartridges tomorrow, my question is, could i take out the activated carbon out of the old one, and put something in it to use as a filter.... i mean the carbon is useless, but the surface of the filter is fine, and i just wanted to know if i could use it with a different media... anything that would be beneficial to my tank? thanks for the help.