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Our 3 Month Service Pack for the Bio-CF2 Internal Cartridge Filter delivers extended care with three biodegradable cartridges, each lasting a month. These cartridges are crafted from sustainable coconut coir and coated with activated carbon, ensuring continuous, high-quality filtration and supporting a plastic-free environment. Effortless filter changes with a perfect fit for your Bio-CF model, along with the simplicity of monthly cartridge replacements, make maintenance easy. The bio-degradable coir tech keeps your aquarium sparkling clean and supports a healthy environment for your fish. As a sustainable choice made from coconut coir, a natural waste product, these cartridges are 100% plastic-free and won't emit harmful microplastics. Every filter change helps reduce plastic pollution in our oceans and make a positive environmental impact.