The Aquascape Small Pond Filter Urn provides efficient mechanical and biological filtration for smaller ponds up to 1,500 gallons, including preformed ponds or container water gardens. The decorative filter housing allows the filter to be easily integrated into almost any setting, adding the sight and sound of trickling water to ponds without a waterfall or stream. The filter can also be added to existing ponds to provide supplemental filtration. The Small Pond Filter Urn is simple to use, and its removable filter lid allows easy access for maintenance. The filter contains a filter mat that provides mechanical filtration and ceramic filtration rings that provide substantial surface area for beneficial bacteria to colonize. Aquascape Large Pond Filter Urns can be easily attached with a 3/4" pipe and are ideal for use with pump flow rates up to 1,100 gallons per hour.