4 pcs Bio Sponge Filter Betta Fry Aquarium Fish Tank Double Sponge
Mechanical and biological filtration are both provided by sponge filters. Simply insert an air carrier into the device to supply your fish with both aeration and filtration.
4 pcs Bio Sponge Filter Betta Fry Aquarium Fish Tank Double Sponge Features:
- Aerobic bacteria colonize the sponge providing a bacterial substance to facilitate the nitrogen cycle.
- In addition, the sponge traps larger waste particles mechanically cleaning the water without trapping baby fish.
- They are useful as a breeding filter or as a secondary filter. Or they can be used as a pre-filtration unit by fitting to an external or a top filter.
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