--- product_id: 63491592 title: "CNZ Air Driven Biochemical Bio Sponge Filter" brand: "cnz" price: "129 zł" currency: PLN in_stock: true reviews_count: 8 url: https://www.desertcart.pl/products/63491592-cnz-air-driven-biochemical-bio-sponge-filter store_origin: PL region: Poland --- # CNZ Air Driven Biochemical Bio Sponge Filter **Brand:** cnz **Price:** 129 zł **Availability:** ✅ In Stock ## Quick Answers - **What is this?** CNZ Air Driven Biochemical Bio Sponge Filter by cnz - **How much does it cost?** 129 zł with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/63491592-cnz-air-driven-biochemical-bio-sponge-filter) ## Best For - cnz enthusiasts ## Why This Product - Trusted cnz brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Description Size:XY-2837 Easy-to use biological filter for tropical aquarium fish Aquarium filter sponge for efficient biological filtration Great biological filter for breeding or spawning aquariums Multi-strata design provides large surface area for optimum filtration. Provides the ideal location for bacterial colonization. Operated by an air pump to create numerous minute bubbles to increase dissolved oxygen content. Replaceable filter sponge allow long lasting use. Supplying the water much needed oxygen Most fit to external or top filter as prefiltration unit No deads spots in cylinder foam offers increased filtration Various types of installations are possible The sponge material is easy to clean Quiet operation Requires an airline tubing and air pump or powerhead for opeation, each sold separately. ## Features - Easy-to use biological filter for tropical aquarium fish Aquarium filter sponge for efficient biological filtration - Supplying the water much needed oxygen Most fit to external or top filter as prefiltration unit No deads spots in cylinder foam offers increased filtration - Various types of installations are possible The sponge material is easy to clean Quiet operation - Beneficial bacteria colonize sponge filter for waste breakdown, Recommend tank size: 20-40 gallons - Total Height : 13.5-inch (with tube), Sponge only: 6.25 x 6 (inch) ; Material : Sponge, Plastic ## Images ![CNZ Air Driven Biochemical Bio Sponge Filter - Image 1](https://m.media-amazon.com/images/I/71-QrRnlv-L.jpg) ![CNZ Air Driven Biochemical Bio Sponge Filter - Image 2](https://m.media-amazon.com/images/I/71SH5va9kAL.jpg) ![CNZ Air Driven Biochemical Bio Sponge Filter - Image 3](https://m.media-amazon.com/images/I/51Ke24tJ4fL.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐ not designed correctly *by D***D on Reviewed in the United States on June 19, 2019* Your browser does not support HTML5 video.  All of the foam filters i have seen send air down a center tube and the bubbles come back up through a larger tube in order to create some suction. The way this filter is designed, there is a larger tube, but the bubbles just go around that tube and not through it. This leads me to believe this is a cheap knock off filter and will not work properly ### ⭐⭐⭐⭐ These fellas are really small *by B***N on Reviewed in the United States on May 3, 2019* It's honestly not all that easy to tell what kind of suction power these smaller unit have. One of them can not handle a 10 gal tank on it's own, and a 5 gal tank housing something like "fry" or a couple of "trios" of guppies or a small school of cardinals would be pushing it's limits. Anything under those levels and they do quite well. I have one of these combined with a bubble filter in a 10 gal tank with an 8 inch Frontosa. She has been in there for nearing a month for treatment, and the filters have kept that tank ship shape and bristle fashion. I use them most often in 1 gal. and 2.5 gal tanks housing my bettas. ### ⭐⭐ Air bubbles not gentle enough for 5-gallon Betta tank *by L***E on Reviewed in the United States on August 30, 2017* Good fit for my 5-gallon glass Betta tank, however the pump (standard, non-adjustable flow, popular brand/model) and tube size on this filter created bubbles that were far too big and strong for a small tank where calm water is necessary for Bettas. Couldn't use this after 5 minutes of testing it, unfortunately, but I know I can't return it either. --- ## 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.pl/products/63491592-cnz-air-driven-biochemical-bio-sponge-filter](https://www.desertcart.pl/products/63491592-cnz-air-driven-biochemical-bio-sponge-filter) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-05-22*