--- product_id: 6721075 title: "Cascade 300 GPH Hang On Filter Replacement Media, 3 Pack - Dual-Sided Aquarium Filter Cartridge with Activated Carbon & Poly-Fiber Floss for CPF5 -Fresh & Saltwater - Blue & Black, ‎10x3x7in" brand: "penn-plax" price: "₹ 5389" currency: INR in_stock: true reviews_count: 13 category: "Penn Plax" url: https://www.desertcart.in/products/6721075-cascade-300-gph-hang-on-filter-replacement-media-3-pack store_origin: IN region: India --- # 300 GPH flow rate 6-12 weeks cartridge lifespan Dual-sided activated carbon + poly-fiber Cascade 300 GPH Hang On Filter Replacement Media, 3 Pack - Dual-Sided Aquarium Filter Cartridge with Activated Carbon & Poly-Fiber Floss for CPF5 -Fresh & Saltwater - Blue & Black, ‎10x3x7in **Brand:** penn-plax **Price:** ₹ 5389 **Availability:** ✅ In Stock ## Summary > 💧 Elevate your aquarium game—because your fish deserve the freshest splash! ## Quick Answers - **What is this?** Cascade 300 GPH Hang On Filter Replacement Media, 3 Pack - Dual-Sided Aquarium Filter Cartridge with Activated Carbon & Poly-Fiber Floss for CPF5 -Fresh & Saltwater - Blue & Black, ‎10x3x7in by penn-plax - **How much does it cost?** ₹ 5389 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.in](https://www.desertcart.in/products/6721075-cascade-300-gph-hang-on-filter-replacement-media-3-pack) ## 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 - • **Effortless Maintenance:** Preassembled cartridges slide in easily—no mess, no fuss, just fresh water fast. - • **Optimized for Cascade 300:** Precision fit prevents debris bypass, ensuring consistent, powerful filtration. - • **Trusted Penn-Plax Quality:** Over 60 years of innovation delivering reliable, durable filtration you can count on. - • **Crystal-Clear Aquarium Water:** Dual-action filtration removes odors, discoloration, and debris for pristine clarity. - • **Versatile Fresh & Saltwater Use:** Engineered to maintain balanced habitats in both freshwater and marine tanks. ## Overview The Penn-Plax Cascade 300 GPH Hang On Filter Replacement Media 3-pack features dual-sided cartridges combining activated carbon and poly-fiber floss to efficiently remove toxins, odors, and debris. Designed specifically for the Cascade 300 filter, each cartridge delivers up to 12 weeks of maintenance-free filtration for both freshwater and saltwater aquariums, ensuring a healthy, sparkling aquatic environment with effortless replacement. ## Description The Penn Plax Cascade 300 GPH Filter Cartridges with Activated Carbon will improve the quality of your aquarium water and keep your fish healthy. This replacement filter is designed to fit your Cascade 300 GPH hang-on power filter and will last 6 to 12 weeks under normal conditions. Activated carbon is great for freshwater aquarium filtration. It has the ability to not only visually clear the water, but trap pollutants in the pores of the carbon so they do not enter the water. This filter cartridge will remove ammonia, nitrites, odors and other harmful toxins from your aquarium to keep it healthy. It has a poly-fiber floss barrier which screens out particulate matter and debris for an extra layer of protection. Within 24 hours you will see a drastic difference in the water quality. Each filter cartridge is perfectly measured to fit into the Cascade 300 Hang on Filter tray without any gaps preventing debris and contaminants from entering back into the water. This filter cartridge is suitable for both freshwater and marine environments. When used together, the Cascade 300 GPH Filter Model CPF5 and Cascade 300 filter cartridges provide maximum protection against water pollutants from harming your fish. Sold in 3 pack. Review: Effective and affordable. - I love these filters. They work perfectly for my 5 and 10 gallon fish tanks. The filters are have a slim design and easily slide into my water filtration system. I just remove the old filter and soak a new one in the tank until it is completely saturated. Then simply slide into your filter. They are that easy to use. No mess to clean up. The filters are very quiet and I have mine in the filtration system for about a month. If for some reason the filter needs changing before that I can hear the water running through the filter and I know it’s time to replace it. These are very durable and dependable filters. I’ve had problems ordering from other companies that change designs without advance warning. I really love my fish and want to provide the best possible high quality environment for them. These filters have consistently been the same every time I order them and they arrive quickly. I think they are extremely affordable and do excellent in a heated tank. I have fresh water tanks that stay around 78 degrees. These work very well and keep everything clean. Review: Simple filters - Have a 6 gallon betta tank these filters work great with the cascade filter. ## Features - Sparkling Water Made Simple - Dual-action aquarium filter cartridge designed for Cascade 300 GPH hang-on filters. Activated carbon removes discoloration and odors while the poly-fiber layer traps particles - keeping your fish tank water clean and clear. - Healthier Habitat for Fish - These filter cartridges provide efficient filtration for both freshwater and marine aquariums, helping maintain a balanced and stable aquatic environment. - Easy Upkeep, Every Time - Each filter cartridge typically lasts up to 6-12 weeks depending on tank conditions. The preassembled design allows quick, clean replacement with no messy setup-simply slide the cartridge into the filter compartment for effective filtration. - Compact Fit, Consistent Flow - Perfectly measured to fit Cascade 300 model (CPF5), these black or blue filter cartridges prevent debris bypass. Dimensions: approximately 10 x 3 x 7 inches. Sold in a convenient 3-pack for easy replacement. - Penn-Plax Legacy - With over 60 years of innovation, Penn-Plax creates expertly crafted, dependable pet products designed to enrich habitats, inspire creativity, and promote the health and happiness of pets everywhere ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0002DJCGS | | Batteries Included? | No | | Batteries Required? | No | | Best Sellers Rank | #15,006 in Pet Supplies ( See Top 100 in Pet Supplies ) #125 in Aquarium Filter Accessories | | Color | No Color | | Customer Reviews | 4.6 4.6 out of 5 stars (3,557) | | Date First Available | May 5, 2011 | | Included Components | 3 Filter Media Replacements | | Is Discontinued By Manufacturer | No | | Item Package Quantity | 1 | | Item Weight | 2 pounds | | Item model number | CPF5C3 | | Manufacturer | Penn Plax | | Material | Plastic | | Part Number | CPF5C3 | | Product Dimensions | 10 x 3 x 7 inches | | Size | Cascade 300 filter (3pack) | | Usage | Indoor | | Warranty Description | Amazon policy | ## Images ![Cascade 300 GPH Hang On Filter Replacement Media, 3 Pack - Dual-Sided Aquarium Filter Cartridge with Activated Carbon & Poly-Fiber Floss for CPF5 -Fresh & Saltwater - Blue & Black, ‎10x3x7in - Image 1](https://m.media-amazon.com/images/I/61Q-+AJ-EWL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: Will this fit the cascade 300 hang on filter? here is the link https://www.amazon.com/gp/product/b0002dj82g/ref=crt_ewc_img_dp_2?ie=utf8&psc=1&smid=a2** A: Thanks for your question. Yes, these filters are designed for the Cascade 300. **Q: I bought a nine pack and only received three. Can anyone help?** A: They come in 3-packs. I've never seen a nine pack. **Q: I have a 65 gallon aquarium for 2 sliders. How often should I change this filter?** A: Hey Wendytime, Thanks for your question. As a general rule, we recommend you that you change the filter cartridges every 6-8 weeks. However, sliders generate more waste than fish and as a result, you should change the media more often. Your tank conditions will dictate how often they should be changed, but figure around every 3-4 weeks. **Q: How do i know when the filters are spent? I had an algae bloom and changed mine out probably too quickly to try control it.** A: I rinse mine and use them until they begin to fall apart. But I also keep a new set in case of RIP or tear. I love these filters. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Effective and affordable. *by A***. on January 18, 2026* I love these filters. They work perfectly for my 5 and 10 gallon fish tanks. The filters are have a slim design and easily slide into my water filtration system. I just remove the old filter and soak a new one in the tank until it is completely saturated. Then simply slide into your filter. They are that easy to use. No mess to clean up. The filters are very quiet and I have mine in the filtration system for about a month. If for some reason the filter needs changing before that I can hear the water running through the filter and I know it’s time to replace it. These are very durable and dependable filters. I’ve had problems ordering from other companies that change designs without advance warning. I really love my fish and want to provide the best possible high quality environment for them. These filters have consistently been the same every time I order them and they arrive quickly. I think they are extremely affordable and do excellent in a heated tank. I have fresh water tanks that stay around 78 degrees. These work very well and keep everything clean. ### ⭐⭐⭐⭐⭐ Simple filters *by P***H on December 21, 2025* Have a 6 gallon betta tank these filters work great with the cascade filter. ### ⭐⭐⭐⭐⭐ Good price *by C***H on December 10, 2025* Good price, great product, excellent seller. --- ## 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.in/products/6721075-cascade-300-gph-hang-on-filter-replacement-media-3-pack](https://www.desertcart.in/products/6721075-cascade-300-gph-hang-on-filter-replacement-media-3-pack) --- *Product available on Desertcart India* *Store origin: IN* *Last updated: 2026-04-23*