Super High Speed anaerobic bacteria builder. Hollow center accelerates the production of nitrifying bacteria in these small ceramic balls (approximately 1 cm in diameter). This greatly enhances the filtration efficiency of a tank, which is important for high grade shrimp tanks.
There is also an abundance of micropores inside the material to absorb heavy metal ions and other harmful substances in the water. Can be used in most types of mechanical/bio filter setups and is very useful in nano tanks where space is at a premium for quality filtration material.