Fluval Zeo-Carb Filter Media Insert Features and Benefits:
- For freshwater use only
- A reliable and efficient 2-in-1 product
- Keeps your aquarium sparkling and healthy
- Designed for use in Fluval External Filters numbers 03, 04 and 05.
Replace once a month, more often if aquarium is heavily populated. Remove when medication is being administered in aquarium water and use carefully when keeping live plants.