Lifegard Aquatics Intelliflo Variable Speed Pond PumpThe Lifegard Aquatics Intelliflo Variable Speed Pond Pump is a highly efficient pump cabable of improving your entire pond experience while reducing energy usage. It has eight programmable speeds and a timer that, once programmed, maximize its energy efficiency and savings. Also, because this pond pump is engineered with ultra-efficient magnet motors (similar to those in hybrid cars) that operate quietly producing only 45dB of noise (which is quieter that moderate rainfall registering at 50dB) you will be able to quetly enjoy your pond. The Intelliflo Variable Speed Pond Pump allows for custom programming of optimum pump speeds for specific tasks such as filtering, heating, cleaning and using waterfalls. For many applications, the optimum speed is lower than the preset and unchangeable speeds of older pumps. This is beneficial because when water moves more slowly for longer periods, it helps reduce the occurrence of algae that forms more easily when water is pumped briskly and then allowed to rest for long intervals. Your filter will also work more effectively because it has more time to sift out particles from the water and because particles won't be forced through the filter media under needlessly high pressure. Automatic chemical dispensers also work better when water is kept moving. The Lifegard Aquatics Intelliflo Variable Speed Pond Pump also features a totally fan-cooled design which protects the unit against the elements. That combined with the built-in diagnostics will keep this unit pumping for a long service life.