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Sand (~3.0 sq ft), Cartridge (100–200 sq ft), DE (36 sq ft).

Your filter's flow rate (GPM) must be equal to or higher than your pump's output. For example, a 20,000-gallon pool with a pump turnover of 42 GPM requires a filter rated for at least 43 GPM. Capacity Chart: buy pool filter

Premium filtration; catches tiny particles for "sparkling" water. Sand (~3