Tetra Whisper 3i In-Tank Power Filter
Engineered for aquariums up to 3 gallons, the Tetra Whisper 3i In-Tank Power Filter delivers the same quality and performance as an external power filter. This air-driven filter oxygenates the water and provides both mechanical and chemical filtration, processing up to 20 gallons per hour.
| Specification | Detail |
|---|---|
| Filter Capacity | Up to 3 gallons aquarium |
| Flow Rate | Up to 20 gallons per hour |
| Includes | Filter unit, air pump, airline tubing, small size Whisper Bio-Bag filter cartridge |
| Brand | United Pet Group – Spectrum |
| Royal Item Number | ATS25846 |
FAQ
What is the maximum aquarium size compatible with the Whisper 3i filter?
The Whisper 3i is designed for use in aquariums up to 3 gallons.
Does the filter provide both mechanical and chemical filtration?
Yes, the Whisper 3i provides mechanical and chemical filtration through its filter media and Bio-Bag cartridge.
What components are included in the package?
The package includes the filter unit, air pump, airline tubing, and a small size Whisper Bio-Bag filter cartridge.

Andrea Blake –
The filter works well in my 3-gallon tank. Water clarity improved noticeably after a week of use. The air pump is quiet and the filter runs smoothly without any leaks. Easy to install and maintain.
Audrey McGrath –
Good performance for a small tank. The flow rate is sufficient and the water stays clean. The bio-bag cartridge is easy to replace and the filter doesn’t make much noise.
Emily Hunter –
I was impressed with how effective it is for a compact tank. It oxygenates the water well and keeps debris from floating. Works perfectly with my live plants.