--- product_id: 642371636 title: "boxtech Mini Aquarium Sponge Filter，Internal Fish Tank Filter for 5-20L Fish Tank (No Include Pump and Tube)" price: "€ 22.44" currency: EUR in_stock: true reviews_count: 3 url: https://www.desertcart.be/products/642371636-boxtech-mini-aquarium-sponge-filter-internal-fish-tank-filter-5 store_origin: BE region: Belgium --- # Ultra-thin, space-saving design Efficient biological filtration & oxygenation Compatible with >1W air pumps (not included) boxtech Mini Aquarium Sponge Filter，Internal Fish Tank Filter for 5-20L Fish Tank (No Include Pump and Tube) **Price:** € 22.44 **Availability:** ✅ In Stock ## Summary > 🐠 Clear water, happy fish, zero clutter! ## Quick Answers - **What is this?** boxtech Mini Aquarium Sponge Filter，Internal Fish Tank Filter for 5-20L Fish Tank (No Include Pump and Tube) - **How much does it cost?** € 22.44 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/642371636-boxtech-mini-aquarium-sponge-filter-internal-fish-tank-filter-5) ## Best For - Customers looking for quality international products ## Why This Product - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Breathe Easy:** Boosts oxygen levels while purifying water for a thriving aquatic environment. - • **Trusted Clarity:** Proven to clear murky water fast—perfect for cycling shrimp jars and small aquatic habitats. - • **Customizable Flow:** Works seamlessly with your choice of air pump for tailored filtration power. - • **Compact Powerhouse:** Sleek, ultra-thin filter fits discreetly in 5-20L tanks without sacrificing performance. - • **Effortless Maintenance:** Quick disassembly and washable sponge keep your tank crystal clear with minimal hassle. ## Overview The boxtech Mini Aquarium Sponge Filter is a compact, ultra-thin internal filter designed for 5-20L fish tanks. It requires a separate air pump (>1W) and air tube to operate, providing efficient biological filtration and oxygenation. Easy to disassemble and clean, it maintains water clarity and a healthy environment for small aquatic pets, making it ideal for shrimp jars and small tanks. ## Description Free delivery and returns on eligible orders. Buy boxtech Mini Aquarium Sponge Filter，Internal Fish Tank Filter for 5-20L Fish Tank (No Include Pump and Tube) at desertcart UK. Review: Great little filter - Great little filter. Cleared the water really well and probably saved my fish whilst I get their new, bigger tank set up Review: Not suitable for goldfish fry as advertised - I lost goldfish fry into to the filter so it’s not suitable ## Features - 【Purchase Note】This fish tank filter need connect Air pump and Air tube,you need have to buy separately! - 【Special desgin】Ultra-Thin,Small size, not take up space in fish tank,Compatible air pump wattage >1W （no include Pump） - 【Main function】Provide Oxygen, Biological filtration and Purified water quality. - 【Easy disassembled】Please wash this filter sponge regular ,creates a clear healthy home for your fish. - 【Additional】please use this aquarium filters with air pump,if you have any install question, please feel free to contact us. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0D7NT1Y9X | | Batteries Included | No | | Batteries required | No | | Best Sellers Rank | 11,501 in Pet Supplies ( See Top 100 in Pet Supplies ) 48 in Aquarium Filters | | Colour | transparent | | Customer Reviews | 3.6 3.6 out of 5 stars (42) | | Date First Available | 21 Jun. 2024 | | Item Weight | 80 g | | Item model number | BT301 | | Package Dimensions | 6.7 x 5.8 x 5.6 cm; 80 g | | Quantity | 1 | | Specific Uses | Active | ## Images ![boxtech Mini Aquarium Sponge Filter，Internal Fish Tank Filter for 5-20L Fish Tank (No Include Pump and Tube) - Image 1](https://m.media-amazon.com/images/I/71MeFKwwTPL.jpg) ![boxtech Mini Aquarium Sponge Filter，Internal Fish Tank Filter for 5-20L Fish Tank (No Include Pump and Tube) - Image 2](https://m.media-amazon.com/images/I/61YQoCVxyoL.jpg) ![boxtech Mini Aquarium Sponge Filter，Internal Fish Tank Filter for 5-20L Fish Tank (No Include Pump and Tube) - Image 3](https://m.media-amazon.com/images/I/61WCQKTlQ6L.jpg) ![boxtech Mini Aquarium Sponge Filter，Internal Fish Tank Filter for 5-20L Fish Tank (No Include Pump and Tube) - Image 4](https://m.media-amazon.com/images/I/61F9I4RrqUL.jpg) ![boxtech Mini Aquarium Sponge Filter，Internal Fish Tank Filter for 5-20L Fish Tank (No Include Pump and Tube) - Image 5](https://m.media-amazon.com/images/I/61rOkJlgFrL.jpg) ## Available Options This product comes in different **Color** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great little filter *by L***Y on 5 April 2026* Great little filter. Cleared the water really well and probably saved my fish whilst I get their new, bigger tank set up ### ⭐ Not suitable for goldfish fry as advertised *by H***S on 23 March 2026* I lost goldfish fry into to the filter so it’s not suitable ### ⭐⭐⭐⭐ Works surprisingly well *by S***H on 18 January 2026* Used this to cycle my shrimp jar and was surprised how well it works; within 24hrs it had cleared all the brown water from the jar (tannins from the driftwood). Nice and quiet. Only downside it that I wasn’t able to reduce the amount of bubbles with the tool provided; it’s all or nothing --- ## 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/642371636-boxtech-mini-aquarium-sponge-filter-internal-fish-tank-filter-5](https://www.desertcart.be/products/642371636-boxtech-mini-aquarium-sponge-filter-internal-fish-tank-filter-5) --- *Product available on Desertcart Belgium* *Store origin: BE* *Last updated: 2026-05-14*