ATI Hydro Sponge Filter #2 Bulk
The ATI sponge filters are excellent biological as well as mechanical filters that only need a source of air to operate. They are ideal for fry tanks because they won’t suck up your baby fish. Suitable for aquariums up to 20 gallons.
Bulk sponge filters are the same as the ones in the box without the packaging.
Key Features
| Feature | Detail |
|---|---|
| Sponge Size | 4 x 2.75 inches |
| Filter Type | Mechanical and Biological |
| Operation | Requires air source only |
| Base Design | Free-standing with heavy base, secure and stable |
| Modular Design | Easy to expand and maintain |
FAQ
Can this filter be used in a fry tank?
Yes, the ATI Hydro Sponge Filter #2 is ideal for fry tanks because it does not create strong suction that could harm small fish.
Is the bulk version different from the packaged one?
No, the bulk version is identical to the one in the box, just without the packaging.
What is the maximum tank size supported by this filter?
This filter is suitable for aquariums up to 20 gallons.

Virginia Carr –
Great filter for my 10-gallon tank. The sponge stays in place well and doesn’t suck up the baby guppies. Easy to clean and maintains water quality effectively.
Una Dickens –
Stable base and no wobbling even during water changes. The sponge is thick and holds debris well. Works well with my planted tank.
Samantha Rutherford –
Perfect for a small fry tank. No fish were lost during setup. The filter is quiet and efficient, and the modular design allows for easy maintenance.