S 3.2cm (100pcs/pack)
M 4.2cm (50pcs/pack)
- Suitable for freshwater and saltwater use
- Special ball structure allows high efficient organic waste, ammonium and nitrite breakdown by filtration bacteria.
- Provides sufficient oxygen supply for filtration bacteria.
- High bacteria activity for long term usage
- Neutral material, do not affect pH
- Use in trickle filter