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Maintain pristine aquarium water with ease using our 1 Month Service Pack for the Bio-CF2 Internal Cartridge Filter. This pack features a biodegradable cartridge made from eco-friendly coconut coir and activated carbon. It provides superior water clarity and health for one month, all while being 100% plastic-free and environmentally conscious. Enjoy effortless filter changes with a perfect fit for your Bio-CF model and the simplicity of monthly cartridge replacements. 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. Reduce plastic pollution in our oceans and make a positive impact with every filter change.