Extra Large Sponge Filter, 8 inch – Air-Driven Biological Filter for Big Planted Tanks
An extra-large sponge filter gives beneficial bacteria and microfauna a huge surface to live on. It moves water gently, so it won’t blow plants around or pull in fry and shrimp.
The problem
Big canister and hang-on filters create strong currents and pull in shrimp and fry. Their media also needs replacing. In a natural tank, most of the filtration is already happening in the soil, plants and biofilm. You need gentle circulation and a bacteria home, not a jet engine.
The Father Fish way
Sponge filters are Lou’s standard in natural tanks: simple, cheap to run, safe for babies, and nothing to replace.
Your plan
- Add air. Connect any standard air pump with airline tubing
| Dimensions | 8 inches in diameter |
|---|---|
| Filter Type | Sponge-based biological filter |
| Power Source | Air-driven (requires air pump) |
| Best For | Big planted tanks, natural ecosystems |
FAQ
Can this filter be used in a tank with live plants?
Yes, the gentle water flow is ideal for planted tanks and won’t damage plants or disturb root systems.
Does the filter require any maintenance or media replacement?
No, the sponge filter does not require media replacement. It is designed to be low maintenance and long-lasting.
Is it safe for small fish like fry and shrimp?
Yes, the soft flow and lack of strong currents make it safe for fry and shrimp to live in the tank without being pulled in.
Leah Manning –
This filter works perfectly in my 55-gallon planted tank. The water flow is very gentle and my plants haven’t been disturbed. I’ve had fry and shrimp in the tank for months without any issues. No maintenance needed, just connect the air pump and go.
Jonathan Bailey –
I switched from a canister filter to this sponge model and noticed a big difference in water movement. My plants are thriving and the tank feels more natural. It’s simple, effective, and fits well in the setup.
Emily Brown –
The filter performs well in a large tank. It’s quiet and doesn’t create strong currents. I like that it doesn’t require cleaning or media changes. A solid choice for natural planted tanks.
Evan Abraham –
Great value for the size and performance. Easy to install with any air pump. My shrimp are safe and the water quality has improved noticeably over the past few weeks.