The Oase PondoVac 4 has two same-size cylinders that are filled and emptied in alternating cycles, which means non-stop vacuuming is enabled.
The PondoVac4 has a hand regulator for adjusting the power suction, for example in shallow water. Likewise, it also enables intermittent back flushing of cogged nozzles. With the PondoVac 4 everything is under control thanks to torsion-resistant aluminium suction tube. You can exert more pressure, especially when using the brush nozzles.
The debris collection bag means that it's Ideal for returning cleaned water when suctioning larger particles - not suitable for pond silt.