Fluval C-Nodes Biological Aquarium Filter Media, 99 g for C2 and C3 Filters

Fluval C-Nodes are replacement biological filter media for Fluval C2 and C3 Power Filters, shaped with complex pores to support beneficial bacteria in aquarium filtration.

• Star-shaped nodes create greater filtration surface area — more area for biological filtration.
• Greater biological filtering ability than most biological media — supports a healthy aquarium environment.
• For freshwater and saltwater aquariums — suited to either water type.
• Each box contains 3.5 ounces (99.2 g) of C-Nodes — a defined quantity of replacement media.

Biological filter media gives beneficial bacteria an environment in which to thrive. Fluval C-Nodes are made for aquarists replacing media in a compatible C2 or C3 Power Filter, with a design focused on biological filtration rather than serving as a standalone filter. Their stated purpose is to contribute to a healthy aquarium environment in freshwater or saltwater setups.

What do Fluval C-Nodes do in an aquarium filter?

Fluval C-Nodes provide biological filter media with a complex pore system that allows beneficial bacteria to thrive. Their star-shaped form increases filtration surface area, and the media offers greater biological filtering ability than most biological media. This makes the nodes a replacement option for aquarists looking to support the biological filtration stage in a compatible filter.

• Designed as replacement aquarium filter media.
• Biological filtration is the stated function of the C-Nodes.

Which filters and aquarium water types are they made for?

Fluval C-Nodes are designed for Fluval C2 and C3 Power Filters. They are suitable for use in both freshwater and saltwater aquariums, so the intended water type does not limit their stated use. Good to know: filter compatibility is specific to the C2 and C3 Power Filter models.

• Compatible filter models: Fluval C2 and C3 Power Filters.
• Intended aquarium types: freshwater and saltwater.

Fluval has worked in aquarium products since 1975, when it introduced a three-stage filter using synchronous motor technology; the brand says that technology remains in use in the industry. The company’s focus on aquarium products provides context for this replacement media, while the C-Nodes’ stated function remains biological filtration in the compatible Fluval filters.

Fluval C-Nodes suit aquarists maintaining a Fluval C2 or C3 Power Filter who want biological replacement media for a freshwater or saltwater aquarium. Their complex pores and star-shaped design give beneficial bacteria a place to thrive while providing greater filtration surface area.

Read our guide: Aquascaping a freshwater tank: substrate, stone, wood and light