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 at 240V. Includes float with two 50-ft. mooring ropes. Requires only 17.5in. Of water to operate. ETL approved to UL and CSA standards. Adds 2.2 lbs. of oxygen per hour. Includes float 200-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. Requires minimal maintenance. Bottom Screen with 84 Vertical Screening Bars with Less Than 1in Gaps to Keep Debris Out and Allow for Maximum Water Flow Into the Unit. ETL listed to UL and CSA safety standards.