• Suitable for ponds up to 500 US gallons (1892 L). • Includes 2 two filter pads (mechanical/ biological & chemical). • Diameter: 19"/48 cm. • Height 4-1/2"/11.4 cm. The Laguna PowerFlo UnderWater Round Filter is equipped with a large 19 inch surface that allows water to flow through easily while trapping suspended debris. The filter comes complete with mechanical, chemical and biological filter media. The result is clean and healthy pond water and a significant reduction in the frequency of clogging in water pumps and fountain heads. Its unique shape is ideal for a number of applications including whiskey barrels, patio & deck basins, and ponds up to 500 US gallons (1892 L). The low-profile design is perfect for ponds or containers as shallow as 5 inches (18 cm). In addition, it can provide a stable base for fountainheads and two pond lights.