just as the title indicates, I'm wondering if I should replace the carbon in my filter with a different kind of media. I'd like to have some extra cycledfilter media around for when I want to cycle new tanks. Suggestions?
I don't know if you're still looking for recommendations, but I have the fluval C4, and replaced my carbon with one pound of . I've been pleased with it so far. My tank was cycling so it helped with that, but it's supposed to be really good in general as well. The C3 may not hold a full pound but that shouldn't matter.