Super Fish Bio Balls are a filter media for biological pond filters.
The large surface area allows a large amount of bacteria to colonize.
SuperFish Bio Balls are highly wear resistant, sot hey have an unlimited service life.
3000ml is sufficient for 375 litres of aquarium water and 1500 litres in ponds.
To avoid excessive disturbance to the biological balance, clean the Bio Balls twice a year.
Suitable for aquarium and pond filters.