Perfect for ponds 5000L or less, these all in one units are the easiest to install. Simply plug it in and away you go. The filter sponge removes sediment and the UV lamp kills the suspended algae that turns you water green leaving your pond or water feature crystal clear. Not to be confused with "Filter Pumps" which are pumps designed to pump water out to external filters.
Need help choosing a suitable filter for your pond? Click on one in your price range - you will go through to a page with a lot more info which will help with your choice.