Fluval C-Nodes for the C4 Power Filters are replacement media for Stage 5, biological media. These C Nodes for the Fluval C4 are enriched with oxygen and are specifically designed for the Fluval Biological Trickle Chamber to provide the perfect biological balance within your Aquarium. C-Nodes will help reduce the toxi ammonia and nitrite to ensure your aquatic friends thrive!
Directions: Replace half of your C-Nodes every 6 months. The balance of beneficial bacteria can be compromised if you replace all of your C-Nodes at once.
Size: 7 oz