--- product_id: 2858702 title: "Fluval U4 Bio-Foam Pad, Replacement Underwater Aquarium Filter Media, A488" brand: "fluval" price: "€ 20.28" currency: EUR in_stock: true reviews_count: 13 url: https://www.desertcart.be/products/2858702-fluval-u4-bio-foam-pad-replacement-underwater-aquarium-filter-media store_origin: BE region: Belgium --- # Versatile for freshwater & saltwater Optimized pore size for water flow Custom-fit mechanical filtration Fluval U4 Bio-Foam Pad, Replacement Underwater Aquarium Filter Media, A488 **Brand:** fluval **Price:** € 20.28 **Availability:** ✅ In Stock ## Summary > 🧼 Keep your tank crystal clear with the ultimate filtration upgrade! ## Quick Answers - **What is this?** Fluval U4 Bio-Foam Pad, Replacement Underwater Aquarium Filter Media, A488 by fluval - **How much does it cost?** € 20.28 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/products/2858702-fluval-u4-bio-foam-pad-replacement-underwater-aquarium-filter-media) ## Best For - fluval enthusiasts ## Why This Product - Trusted fluval brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **First-Line Defense:** Captures large particles and debris effectively, powering the crucial first stage of your aquarium’s filtration. - • **Flow-Optimized Foam:** Ideal pore size balances maximum water flow with minimal clogging for long-lasting, efficient filtration. - • **Trusted Legacy Innovation:** From Fluval, pioneers of 3-stage filtration technology since 1975, ensuring cutting-edge quality and performance. - • **Precision Fit, Zero Escape:** Custom-designed to snugly fit the Fluval U4 filter chamber, ensuring no debris bypasses your filtration system. - • **Universal Aquatic Compatibility:** Engineered for freshwater, saltwater, and reptile tanks—one pad to rule all your aquatic habitats. ## Overview The Fluval U4 Bio-Foam Pad is a precision-engineered replacement filter media designed exclusively for the Fluval U4 Underwater Filter. It provides effective mechanical filtration by capturing large debris, features an optimized pore size for superior water flow and reduced clogging, and is suitable for freshwater, saltwater, and reptile environments. Backed by Fluval’s decades-long innovation legacy, this pad ensures long-lasting, reliable filtration to keep your aquatic ecosystem pristine. ## Description The Fluval Bio-Foam Pad was designed specifically for the U4 Underwater Filter model to captures large particles and debris for effective mechanical filtration, the crucial first stage in the filtration process. Custom fit to prevent bypass, the pad has a pore size that allows efficient water flow with less clogging for long-lasting filtration. The Fluval Bio-Foam Pad is suitable for freshwater, marine or reptile environments. For more fish tank accessories, check out other Fluval products including aquarium filters, aquarium heaters, aquarium air pumps, aquarium lights, aquarium rocks, aquarium thermometers, and aquarium stands. Fluval has a wide variety of products that are perfect for your pet fish to enjoy in any large fish tank, small fish tank, saltwater tank or freshwater tank. Fluval broke onto the aquatic scene in 1975 by introducing the world’s first 3-stage filter with synchronous motor technology – a breakthrough that is still applied in the industry today. Since then, Fluval has built a legacy around this pioneering spirit, relentlessly adapting in a changing world to launch innovative aquarium products that remain at the forefront of technology, and which set the bar in quality, style and functionality. Fluval’s mission is not just about building products that mimic the natural world, but inspiring aquarists of all skill levels to enjoy and respect the hobby for generations to come. ## Features - Provides effective mechanical filtration - Fits perfectly inside the filter chamber to prevent debris from escaping - Ideal pore size allows efficient water flow, less clogging and long-lasting filtration - Suitable for freshwater, saltwater or reptile environments - Specially designed for use with the Fluval U4 Underwater Filter ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B001XRSSJ4 | | Best Sellers Rank | #445 in Aquarium Filter Accessories | | Date First Available | August 19, 2004 | | Department | Unisex-Adult | | Item Model Number | A488 | | Manufacturer | Rolf C. Hagen (USA) Corp. | | Product Dimensions | 2.7 x 2.7 x 11 inches; 1.34 ounces | ## Product Details - **Brand:** Fluval - **Item Form:** Foam - **Item Weight:** 1.28 ounces - **Manufacturer:** Rolf C. Hagen (USA) Corp. - **Unit Count:** 1 Count ## Images ![Fluval U4 Bio-Foam Pad, Replacement Underwater Aquarium Filter Media, A488 - Image 1](https://m.media-amazon.com/images/I/51mpiwLZeFL.jpg) ![Fluval U4 Bio-Foam Pad, Replacement Underwater Aquarium Filter Media, A488 - Image 2](https://m.media-amazon.com/images/I/61GZPhKPmbL.jpg) ![Fluval U4 Bio-Foam Pad, Replacement Underwater Aquarium Filter Media, A488 - Image 3](https://m.media-amazon.com/images/I/61wwa0BY8DL.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works well *by on Reviewed in the United States July 11, 2026* I have a hard time finding these where I live. Easy to replace in my filter and works well ### ⭐⭐⭐⭐⭐ Works great *by on Reviewed in the United States December 30, 2023* fit like they should, some people don't like this filter in the reviews but they do a decent job and are easy to take to take out and rinse. ### ⭐⭐⭐⭐⭐ Special water filters for aquariums *by on Reviewed in the United States January 11, 2026* Can’t find these in stores any more. Happy I could find them on Amazon. They fit my aquarium filter perfectly ## Frequently Bought Together - Fluval U4 Bio-Foam Pad, Replacement Underwater Aquarium Filter Media, A488 - Fluval U Underwater Filter BioMax - Fluval U4 Poly-Carb Cartridge, Replacement Underwater Aquarium Filter Media, 2-Pack, A492 --- ## 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.be/products/2858702-fluval-u4-bio-foam-pad-replacement-underwater-aquarium-filter-media](https://www.desertcart.be/products/2858702-fluval-u4-bio-foam-pad-replacement-underwater-aquarium-filter-media) --- *Product available on Desertcart Belgium* *Store origin: BE* *Last updated: 2026-10-06*