- Specifically designed for Fluval 306/307 and 406/407 filters
- Effective at reducing and controlling toxic ammonia spikes
- Effectively traps floating particles for clear water (debris, excess food and waste)
- Ideal for new and heavily stocked aquariums
- Use after medicating fish
- Custom fit for 07 and 06 series filter to increase filtration efficiency
- For best results, replace monthly or as required after testing water
- Convenient 6-pack format
- For use in freshwater and saltwater aquariums