Sera Air Operated Sponge Filter
An air-operated internal sponge filter that functions like a mammoth or airlift pump. It is connected to a standpipe via a hose and activated by an air pump. Air draws aquarium water upward, passing through the fine mesh sponge where mechanical filtration occurs. The water then flows back into the tank, filtering impurities as it passes through the sponge. Nitrifying bacteria essential for breaking down pollutants settle within the sponge’s structure.
Designed for optimal performance with small fish and larvae, this filter minimizes the risk of loss due to the small size and active swimming behavior of juvenile fish.
| Feature | Detail |
|---|---|
| Filter Type | Internal sponge filter |
| Operation | Air-operated |
| Material | Fine mesh sponge |
| Best For | Larvae and juvenile fish |
FAQ
How does the air-operated sponge filter work?
The filter is connected to an air pump via a hose and placed in the standpipe. Air from the pump draws water upward through the sponge, where it is filtered. The water then returns to the tank, allowing mechanical filtration and bacterial colonization within the sponge.
Is this filter suitable for tanks with small fish or fry?
Yes, this filter is specifically designed for rearing larvae and juvenile fish. Its gentle water flow and large surface area reduce the risk of fish being sucked into the filter or lost during movement.
Can I use this filter with a standard air pump?
Yes, it is compatible with standard air pumps as long as the hose and standpipe are properly connected.



Gabrielle Paterson –
The filter works very well for my fry tank. The water flow is gentle and the fry stay safe. The sponge holds bacteria well and the water stays clean. Easy to install and maintain.
Julia Wright –
Great for small fish. The air flow is steady and the filter doesn’t stir up the water too much. I noticed the bacteria settled well over a few weeks. Slight improvement in water clarity after a month.
Olivia McLean –
Used it for my neon tetra fry. No fish were lost, which was a big relief. The filter runs quietly and the water quality improved noticeably. I’d recommend it for beginners with small fish.