Diatomaceous earth (DE) filters are a type of filtration system that uses a fine powder made from the fossilized remains of tiny aquatic organisms called diatoms. These filters are effective in removing impurities and particles from liquids, making them popular in industries like water treatment and brewing. The DE powder is spread over a filter grid, creating a porous layer that traps contaminants while allowing clean liquid to pass through. This method is known for its high efficiency and ability to filter out very small particles, contributing to clearer and cleaner end products.