What is a Sponge Filter?
A sponge filter is an aquarium filter that combines mechanical and biological filtration in a single device.
How it works
- Water is drawn through a porous sponge
- Debris is trapped (mechanical filtration)
- Beneficial bacteria colonize the sponge surface (biological filtration)
- Air pump drives water flow, providing oxygenation
Advantages
- Gentle water flow, safe for fry and delicate fish
- Easy to clean and maintain
- Cost-effective and reliable
Sponge filters are ideal for small aquariums, breeding tanks, and community tanks requiring low water turbulence.