Fluval FX4/FX5/FX6 Bio-Foam - 3 pack
- Mechanical filter media
- Effectively traps majority of waste and debris
- Complex foam structure maintains consistent water flow and naturally promotes beneficial bacteria growth
- Custom fit to prevent debris bypass
- Enhances the biological filtration process
- Convenient 3-pack format
- Replace every 6 months
- For use in freshwater and saltwater aquariums