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    Lifespan and reliability

    ⏳

    A plastic septic tank lasts 40 or more years. A reed bed filter has no mechanical parts that could break down. Gravel does not decompose, and plants regenerate. Compare this to a conventional biological treatment plant, where the blower lasts 5 to 8 years and costs €200 to €400. With a reed bed treatment plant, these expenses do not exist.