King British Filter Aid is a rich-source of friendly-microbes that will help you maintain better water quality. A weekly addition to your aquarium water will reduce harmful ammonia & nitrite, making the water safer for your fish. Regular use improves the development of the biological filter for clean, clear water.

One 100ml bottle will enrich up to 900 litres.

- Improves the development of the biological filter
- Contains millions of specially selected live bacteria
- For clean, clear water
- For use in tropical, coldwater and marine aquariums