--- product_id: 325499712 title: "Tetra Whisper In-Tank Filter 40i with BioScrubber - 20-40 gallon (25818), Black" brand: "tetra" price: "379.54 DT" currency: TND in_stock: true reviews_count: 8 category: "Tetra" url: https://www.desertcart.tn/products/325499712-tetra-whisper-in-tank-filter-40i-with-bioscrubber-20-40 store_origin: TN region: Tunisia --- # Air-driven oxygenation system Dual-sided dense mesh debris catcher 170 GPH filtration power Tetra Whisper In-Tank Filter 40i with BioScrubber - 20-40 gallon (25818), Black **Brand:** tetra **Price:** 379.54 DT **Availability:** ✅ In Stock ## Summary > 💧 Elevate your aquarium game with whisper-quiet, powerhouse filtration! ## Quick Answers - **What is this?** Tetra Whisper In-Tank Filter 40i with BioScrubber - 20-40 gallon (25818), Black by tetra - **How much does it cost?** 379.54 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/325499712-tetra-whisper-in-tank-filter-40i-with-bioscrubber-20-40) ## Best For - tetra enthusiasts ## Why This Product - Trusted tetra brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Whisper-Quiet Operation:** Submerged motor minimizes noise, perfect for peaceful office or home vibes. - • **Easy Bio-Bag Cartridge Swap:** Large, user-friendly cartridges make maintenance a breeze—stay hassle-free. - • **Seamless Wall-to-Wall Setup:** Mounts inside tank for sleek, flush placement—no bulky hangers. - • **Powerful & Efficient Filtration:** Filters up to 170 gallons per hour, keeping your aquatic ecosystem pristine. - • **Adaptive Water Level Compatibility:** Adjusts easily to varying water depths, ideal for diverse tank setups including turtles. ## Overview The Tetra Whisper In-Tank Filter 40i is a compact, internal filtration system designed for 20-40 gallon aquariums. Combining a powerful 170 GPH air-driven filter with dual-sided mesh debris capture and oxygenation, it mounts inside the tank for a sleek look and whisper-quiet operation. Its easy-to-change Bio-Bag cartridges and adjustable mounting make it a versatile, low-maintenance choice for professional-grade aquatic care. ## Description For the ultimate in convenience and quiet, choose a Whisper In-Tank Filter. These filters mount on the inside of the aquarium, rather than hanging from the outside -- making it possible to place the tank flush against a wall. In-Tank Filters are unusually quiet, since the motor is under the water. Offering the same quality and performance as an external filter, the Whisper In-Tank Filter will function in as little as 2 inches of water -- making it ideal for turtle tanks, or for creating a waterfall inside the tank.The Whisper In-Tank filter features adjusts easily to high or low water levels with mounting suction cups and/or bracket. Each filter comes with one pre-assembled Whisper Bio-Bag filter cartridge. Review: Disappointed !!! - Worst filter, don’t buy this…the motor dies in few hours and doesn’t work anymore. Review: Very bad experience - Motor is not woking properly, very big broken sounds is coming out from the motor, request desertcart to refund, very sad. ## Features - UNIVERSAL DESIGN: Tetra Whisper 40i Internal Filter is an all-in-one air pump and water filter system. - INTERNAL FILTER: Mounts on the inside of your aquarium with clip (included). - CATCHES DEBRIS: Dense, dual-sided mesh filters debris and fish waste. - AERATES WATER: Air-driven design filters up to 170 GPH while oxygenating water. - CONVENIENT DESIGN: Uses large easy to change Bio-Bag cartridges; filter mounts inside aquarium, making it possible to place tank flush against the wall. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0002DHYH2 | | Best Sellers Rank | #23,661 in Pet Supplies ( See Top 100 in Pet Supplies ) #1,344 in Aquarium Accessories | | Brand | Tetra | | Brand Name | Tetra | | Color | black | | Colour | black | | Customer Reviews | 4.3 out of 5 stars 21,393 Reviews | | EU Spare Part Availability Duration | 1 Years | | Global Trade Identification Number | 00046798258186 | | Included Components | Whisper In-Tank Filter 40i (upto 40 Gal) | | Item Type Name | Tetra Whisper Internal Filter 20 To 40 Gallons, For aquariums, In-Tank Filtration With Air Pump | | Item Weight | 1.5 Pounds | | Item weight | 1.5 Pounds | | Manufacturer | Tetra | | Manufacturer Part Number | AQ-65818 | | Material | 100% Polyester | | Material Type | 100% Polyester | | Model Number | AQ-65818 | | Product Style | In-Tank | | Specific Uses For Product | Active | | Style | In-Tank | | UPC | 046798258186 | | Unit Count | 1 Count | ## Images ![Tetra Whisper In-Tank Filter 40i with BioScrubber - 20-40 gallon (25818), Black - Image 1](https://m.media-amazon.com/images/I/81W+Z3JdNIL.jpg) ![Tetra Whisper In-Tank Filter 40i with BioScrubber - 20-40 gallon (25818), Black - Image 2](https://m.media-amazon.com/images/I/616wIETjADL.jpg) ![Tetra Whisper In-Tank Filter 40i with BioScrubber - 20-40 gallon (25818), Black - Image 3](https://m.media-amazon.com/images/I/51PTT5eqAQL.jpg) ![Tetra Whisper In-Tank Filter 40i with BioScrubber - 20-40 gallon (25818), Black - Image 4](https://m.media-amazon.com/images/I/41kHtZhL4cL.jpg) ![Tetra Whisper In-Tank Filter 40i with BioScrubber - 20-40 gallon (25818), Black - Image 5](https://m.media-amazon.com/images/I/5172NHWOa5L.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐ Disappointed !!! *by T***Q on 7 April 2025* Worst filter, don’t buy this…the motor dies in few hours and doesn’t work anymore. ### ⭐ Very bad experience *by B***E on 23 August 2024* Motor is not woking properly, very big broken sounds is coming out from the motor, request amazon to refund, very sad. ### ⭐ Stopped working after 30mins *by S***B on 15 February 2023* Product looked amazing but stopped working after 30mins… ## Frequently Bought Together - Tetra Whisper Internal Filter 20 To 40 Gallons, For Aquariums, In-Tank Filtration With Air Pump - Tetra Whisper Bio-Bag Filter Cartridges For Aquariums - Ready To Use BLUE, Large, 3 Count (Pack of 1) - TetraFauna AquaSafe for Reptiles and Amphibians 3.38 Ounces, Aqua-Terrarium Water Conditioner, Makes Tap Water Safe --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/325499712-tetra-whisper-in-tank-filter-40i-with-bioscrubber-20-40](https://www.desertcart.tn/products/325499712-tetra-whisper-in-tank-filter-40i-with-bioscrubber-20-40) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-07-20*