For years, the Little Sister 2000 has been the mainstay of our filter line. Easy to clean, amazingly efficient and ruggedly built, the Little Sister provides amazing value and performance to the pond owner. No wonder it has been the standard all other pond filters should be judged by for over ten years. The Little Sister 2000’s dual chamber design and standard drain valves make cleaning a snap. Each chamber can be cleaned individually in seconds by shaking the filter media and opening the drain valve. This simple process saves countless hours of cleaning time over a single season!