PondMax Pond Pump Pre-Filter Sponges Model:PONDMAX MEDIUM PREFILTER SPONGE F11 As the water level rises

As the water level rises in the diverter chamber

"Rainfall chart" for tracking rainfall

Important components like bearings

In this way slits resist tearing

such as the 90mm

PondMax Pond Pump Pre-Filter Sponges Model:PONDMAX MEDIUM PREFILTER SPONGE F11 As the water level risesSponge prefilters will adapt to a variety of pumps, saving you cleaning time. They also harbour beneficial bacteria and extend the life of your pump by reducing wear and tear. PondMax's Small prefilter reduces the cleaning intervals of your pump whilst remaining discrete within the pond. This small prefilter is 150 x 100 x 100mm and has an inlet and outlet of 15mm male. PondMax's Medium prefilter is the perfect balance between size and performance.