Professional 1400 Watt Premium Pond & Muck Vacuum Cleaner w/Free Pond Cleaning Gloves Effective Sludge vacuum with 1400 watt motor. Automatic activation / restart and emptying through intelligent device control. 27 litre holding tank. Gravity discharge, no pump located inside. Includes 4 suction nozzles ( Crevice nozzle, algae nozzle, flat nozzle with rubber lip, variable special sludge nozzle (2-10 mm) Allows operator to move around pond when the vacuum is draining, auto restart. Great for filtering water back into pond