Aquarium filtration is a crucial process that helps maintain a healthy environment for aquatic life. It involves removing waste, debris, and harmful substances from the water, ensuring that fish and plants thrive. There are three main types of filtration: mechanical, biological, and chemical. Mechanical filtration physically removes particles, while biological filtration uses beneficial bacteria to break down harmful toxins. Chemical filtration involves using substances like activated carbon to absorb impurities. Proper filtration systems, such as canister filters or sump filters, are essential for both freshwater and saltwater aquariums. Regular maintenance, including cleaning filter media and replacing cartridges, is necessary to keep the filtration system effective. A well-functioning filter contributes to clear water and a stable ecosystem, promoting the overall health of the aquarium.