For high water polishing results use our Ahi Hydro Vortex Backwashable filter. The Ahi is perfect for ponds up to 1,000 Gallons total and 16″ waterfall width. It’s capable of outputting waterfall flow rates up to 3,000 gph. This filter features an upper and lower diffuser grate and requires no blower or air pump. Contact us for more info on easy to clean waterfall filters.