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Tetra Whisper 120-40 Internal Submersible Water Filter

20-40 Internal Filter

Due to supply chain constraints affecting inventory levels on some brands and products, it is possible that this item may be cut. We apologize for this inconvenience and will automatically refund any items not shipped.


The submersible filter includes a 3-stage filtration system with a dual-sided Bio-Bag mesh, which catches debris and fish waste while the activated carbon absorbs odors and discoloration. The bio-scrubber features an anti-clog design for convenient and easy maintenance. The bio-scrubber also has a solid back, which pushes the water making it flow evenly over the bacteria-rich bristles for supreme performance. This filter is compatible with Tetra Bio-Bags for easy and reliable maintenance.

Why We Love It:

  • Features a submersible filter with a quiet, convenient, 3-stage filtration system—chemical, biological and mechanical.
  • Dual-sided Bio-Bag mesh that catches debris and fish waste with an activated carbon that absorbs odors and discoloration.
  • The bio-scrubber’s solid back allows the water to flow evenly over the bacteria-rich bristles for best performance.

About Tetra

Tetra aquarium products are dedicated to helping seasoned hobbyists and beginners alike to enjoy a successful, life-long aquatic experience. Our complete line of Tetra nutrition, water care, filtration and aquarium products help make fishkeeping accessible to all hobbyists so they can benefit from its rewards.


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