PF300 40W 660GPH Pond Filter FountainIntegrated Filtration System: This multi functional compact pond filter fountain combines everything needed for a healthy pond. It helps keep water balanced and crystal clear, protects the pump from debris clogging, and helps protect fish from the impeller. Perfect for koi ponds, small ponds, aquariums, and water gardens. Built in Efficient UV Clarifier: The built in uv filter for pond use helps inhibit aquatic organisms, reduce green water, and