--- product_id: 12975511 title: "Cascade 300 Power Filter Replacement Bio Sponge, 2 Pack -Durable Aquarium Filter Media Compatible with Cascade Power Filters -Improves Water Flow & Filtration Efficiency -Black, 7 x 1 x 5 In" brand: "penn-plax" price: "€ 21.18" currency: EUR in_stock: true reviews_count: 9 url: https://www.desertcart.be/products/12975511-cascade-300-power-filter-replacement-bio-sponge-2-pack-durable store_origin: BE region: Belgium --- # Bio sponge filtration 2-pack convenience 300 GPH flow rate Cascade 300 Power Filter Replacement Bio Sponge, 2 Pack -Durable Aquarium Filter Media Compatible with Cascade Power Filters -Improves Water Flow & Filtration Efficiency -Black, 7 x 1 x 5 In **Brand:** penn-plax **Price:** € 21.18 **Availability:** βœ… In Stock ## Summary > 🌊 Dive into Cleanliness! ## Quick Answers - **What is this?** Cascade 300 Power Filter Replacement Bio Sponge, 2 Pack -Durable Aquarium Filter Media Compatible with Cascade Power Filters -Improves Water Flow & Filtration Efficiency -Black, 7 x 1 x 5 In by penn-plax - **How much does it cost?** € 21.18 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/12975511-cascade-300-power-filter-replacement-bio-sponge-2-pack-durable) ## Best For - penn-plax enthusiasts ## Why This Product - Trusted penn-plax brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Pollutant Defense:** Prevents harmful debris from re-entering your aquatic paradise. - β€’ **Value Pack Savings:** Get double the filtration power with this 2-pack! - β€’ **Crystal Clear Waters:** Experience pristine aquarium clarity with every use. - β€’ **Effortless Maintenance:** Designed for seamless fit in Cascade 300 filters. - β€’ **Eco-Friendly Filtration:** Promotes beneficial bacteria growth for a healthier tank. ## Overview The Penn-Plax Cascade 300 GPH Hang On Filter Aquarium Bio Sponge Replacement is a high-performance filter cartridge designed specifically for the Cascade 300 GPH hang-on power filter model CPF5. This 2-pack ensures your aquarium remains clean and clear by effectively removing dirt and debris while promoting the growth of beneficial aerobic bacteria. ## Description The Penn Plax Cascade 300 GPH Hang On Filter Bio Sponge keeps the water in your aquarium clean and clear. This Cascade filter removes particles from your fish tank healthy and clean. This bio sponge also optimizes the colonization of beneficial aerobic bacteria which prevents cloudy water. Made specifically to fit the Cascade 300 Hang On Filter; this replacement bio sponge fits securely without gaps that lead to weaknesses in filtration strength. An exact fit keeps debris and contaminants from getting through your filtration system and back into water. Made of a durable poly-fiber; this bio sponge filter is made to last for several months under normal conditions. When used together; the Cascade 300 Hang On Filter Model CPF5 and Cascade 300 bio sponge filter cartridges provide maximum protection against water pollutants from harming your fish. Sold in a pack of 2. ## Features - Keep your tank clean and clear with the genuine Penn Plax filter cartridge to fit your Cascade 300 GPH hang-on power filter model CPF5. Sold in 2 Pack. - The bio sponge filter removes dirt and debri from your aquarium tank keeping your aquarium clean and clear. - Filter sponge optimizes the colonization of beneficial aerobic bacteria which prevents the water from becoming cloudy and harming fish. - Perfectly cut to fit into the Cascade 300 Hang On Filter tray without any gaps which could allow pollutants to re-enter the water. ## Images ![Cascade 300 Power Filter Replacement Bio Sponge, 2 Pack -Durable Aquarium Filter Media Compatible with Cascade Power Filters -Improves Water Flow & Filtration Efficiency -Black, 7 x 1 x 5 In - Image 1](https://m.media-amazon.com/images/I/71prM+I7vbL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars Filters well *by B***Y on Reviewed in the United States πŸ‡ΊπŸ‡Έ on January 6, 2023* Must have and they work as they should ### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars Works as advertised *by M***F on Reviewed in the United States πŸ‡ΊπŸ‡Έ on July 22, 2020* Both sides of the 300 Bio sponge insert provided for in this box, the plastic frame is not included. Order the Carbon media insert seperatly. ### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars 2 in one *by E***E on Reviewed in the United States πŸ‡ΊπŸ‡Έ on August 11, 2018* I have a aquaflow filter and I needed to replace the bio sponge. This works for me since I also get a spare one for my small economic side filter. --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.be/products/12975511-cascade-300-power-filter-replacement-bio-sponge-2-pack-durable](https://www.desertcart.be/products/12975511-cascade-300-power-filter-replacement-bio-sponge-2-pack-durable) --- *Product available on Desertcart Belgium* *Store origin: BE* *Last updated: 2026-05-18*