--- product_id: 325499712 title: "Tetra Whisper In-Tank Filter 40i with BioScrubber - 20-40 gallon (25818), Black" brand: "tetra" price: "KD 21.18" currency: KWD in_stock: true reviews_count: 8 category: "Tetra" url: https://www.desertcart.com.kw/products/325499712-tetra-whisper-in-tank-filter-40i-with-bioscrubber-20-40 store_origin: KW region: Kuwait --- # Dual-sided debris mesh 170 GPH filtration power Universal in-tank mounting Tetra Whisper In-Tank Filter 40i with BioScrubber - 20-40 gallon (25818), Black **Brand:** tetra **Price:** KD 21.18 **Availability:** ✅ In Stock ## Summary > 💧 Elevate your aquarium game with whisper-quiet, powerful 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?** KD 21.18 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.kw](https://www.desertcart.com.kw/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 - • **Space-Savvy Design:** Mounts inside tank, letting you place your aquarium flush against any wall. - • **Powerful 170 GPH Flow:** Efficient air-driven filtration keeps water crystal clear and oxygen-rich. - • **Whisper-Quiet Operation:** Submerged motor minimizes noise for a peaceful aquatic vibe. - • **Easy Bio-Bag Cartridge Swap:** Large, user-friendly cartridges make maintenance a breeze. - • **Versatile Water Level Adjustment:** Suction cups and brackets adapt to varying tank depths, perfect for turtles or waterfalls. ## Overview The Tetra Whisper In-Tank Filter 40i is a compact, all-in-one internal filter and air pump designed for 20-40 gallon aquariums. It features a quiet submerged motor, dual-sided mesh for debris capture, and a powerful 170 gallons per hour filtration rate. Its space-saving design mounts inside the tank, allowing flush placement against walls, and uses easy-to-change Bio-Bag cartridges for hassle-free maintenance. Ideal for diverse aquatic setups, including turtle tanks and decorative waterfalls. ## 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 | | Allergen Information | Gelatin Free | | Batteries | Product Specific batteries required. | | Batteries Included | No | | Best Sellers Rank | #26,891 in Pet Supplies ( See Top 100 in Pet Supplies ) #1,472 in Aquarium Accessories | | Color | black | | Customer Reviews | 4.2 4.2 out of 5 stars (21,113) | | Date First Available | 7 August 2012 | | Flavor | Flavorless | | Item Form | Canister | | Item Weight | 680 g | | Item model number | AQ-65818 | | Number of Items | 1 | | Pet Life Stage | all ranges | | Pet Type | Aquatics, Aquatics Filter Media, Aquatics Filter Media Filter Inserts, PetSupplies | | Product Dimensions | 14.86 x 12.93 x 26.14 cm; 680.39 g | | Quantity | 1 | | Size | Up to 40-Gallons | | Specific Uses | Active | | Volume | 5 Liters | | batteries required | No | ## 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) ## 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.com.kw/products/325499712-tetra-whisper-in-tank-filter-40i-with-bioscrubber-20-40](https://www.desertcart.com.kw/products/325499712-tetra-whisper-in-tank-filter-40i-with-bioscrubber-20-40) --- *Product available on Desertcart Kuwait* *Store origin: KW* *Last updated: 2026-05-15*