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Enjoy long-lasting water clarity with the 3 Month Service Pack for the Bio-CF1 Internal Cartridge Filter. Containing three biodegradable cartridges, this pack offers three months of uninterrupted performance. Each cartridge is made from sustainable coconut coir and features a natural latex coating with activated carbon, ensuring optimal filtration without harming the planet. Effortless filter changes with a perfect fit for your Bio-CF model, combined with the simplicity of monthly cartridge replacements, make maintenance a breeze. The bio-degradable coir tech keeps your aquarium sparkling clean and supports a healthy environment for your fish. Made from coconut coir, a natural waste product, these cartridges are 100% plastic-free and won't emit harmful microplastics, helping to reduce plastic pollution in our oceans with every filter change.