The Hydro Sponge filters provides both mechanical and biological filtration. Aerobic bacteria colonize the sponge, providing a bacterial substrate to facilitate the nitrogen cycle. In addition, the Hydro-Sponge traps larger waste particles, mechanically cleaning the water without trapping the baby fish.
Five Sizes Available:
- Hydro Sponge I, up to 10 gal.
- Hydro Sponge II, up to 20 gal.
- Hydro Sponge III, up to 30 gal.
- Hydro Sponge IV, up to 80 gal.
- Hydro Sponge V, up to 120 gal.
Click HERE for Replacement Sponges