The Oase PondoVac Classic is a sludge vacuum cleaner, which features a 1400 watt high performance motor. This can remove debris up to 10mm in size including algae, string algae, sludge, dead vegetation etc. The PondoVac's 27 litre tank is made of impact resistant plastic and features an automatic self emptying sludge draining system. The sludge is drawn through one of the 4 suction nozzles into the tank via the 4m suction hose. Once the pond vac's container is full, the motor switches off automatically through the intelligent motor control. As soon as this happens a special valve at the end of the Oase PondoVac Classic's 2m long discharge hose opens automatically allowing the sludge to drain out of the tank. This takes approximately 25 seconds. The PondoVac Classic pond vacuum then automatically starts to suck again. Effective silt removal with powerful 1400w motor Automatic activation and emptying through intelligent motor control Compact design with 27 litre tank High power suction to a depth of 1.5m Comes complete with 4 different suction nozzles Includes 4m suction hose and 2m discharge hose 2 Year warranty