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A matten filter is a simple, sponge-style filter that gives both mechanical and biological cleaning. In a matten filter aquarium, a large foam mat pulls water slowly through, trapping debris and giving helpful bacteria a place to grow. Many hobbyists use the mattenfilter design for breeding and shrimp tanks because they're safe for fry shrimp, and create more surface area. Matten filters are easy to clean, long-lasting, affordable, and great for keeping water stable in planted or community tanks.
