- Inert ceramic cylinders with exceptionally porous surface.
- Provides optimum conditions for high colonisation of beneficial bacteria, breaking down ammonia and nitrite in water.
- Unique cylinder design does not obstruct water passage, making this media ideal for use with Hydor Prime external filters in fresh water or marine aquariums.
- Use as directed by filter manufacturer.
- These non-toxic ceramic cylinders can be rinsed in warm water.
- Do not use soap or detergent.
- Size:One Size