"The 3400HAF High Oxygen Transfer Aerator produces a crown of water at the surface, adding 2.2 lbs. of oxygen per hour. Draws 3.4 Amps @ 240V. Includes float with two 50-ft. mooring ropes. Requires only 17.5in. of water to operate. ETL approved to UL and CSA standards. Aerator Type Surface, Model 3400HAF, Running Amps 3.4, Volts 240, Pattern Crown, Water Depth Required in. 18, HP 3/4, Power Cord ft. 50, Power Cord gauge 14, Approximate Pond Size acres 3/4, Starting Amps 9. Adds 2.2 lbs. of oxygen per hour Includes float, 50-ft. power cord, two 50-ft. mooring ropes Long-life top and bottom ball bearings Environmentally friendly oil-filled motor is sealed against leaks Flood oil lubricated to dissipate heat Highly efficient, with low power consumption Works well in salt water and other corrosive environments Stainless steel external motor, float and hardware components with zinc anode Optional bottom screen, Item# 34034, sold separately Requires minimal maintenance ETL listed to UL and CSA safety standards Ships in 2 boxes"