Fluval C3 -- Replace Carbon Bag With Something Better?

Discussion in 'Filters and Filtration' started by LadyGrey, Apr 10, 2019.

  1. LadyGreyValued MemberMember

    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 cycled filter media around for when I want to cycle new tanks. Suggestions?
  2. 86 ssinitWell Known MemberMember

    Yes remove it and replace with matrix or crushed lava rock. Put either of those into a media bag and add to filter. Both will give bacteria places to grow.
  3. imbaWell Known MemberMember

    More bio media is always good.
    You can also just add some good ol sponge. It will add to both bio and mechanical filters
  4. NierumsValued MemberMember

    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 Biohome Ultra Red media. 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.
  5. IslandvicWell Known MemberMember

  6. LadyGreyValued MemberMember