I needed to remedy my one acre pond because of an infestation of water meal. I found that the Fujimac aerator fit the bill—1 amp power needed allowing me to use 500 feet of inexpensive outdoor extension cord and a savings of about 40% on the cost of the unit itself. All told I spent about $500 dollars for the system that included two aerator heads. The Fujimac works great. Quiet, inexpensive to run, no need to enclose it and great customer support. I couldn’t be more pleased.