something not quite adding up with a 1/4 hp pump using that much electricity per day. It should be no more that 500 watts, maybe less. that is 12 kwh per day running full time. Cost of electricty would have to be $2.00 per kilowatt hr., or more than 10 times the national average. At that rate, it would take $2000.00 per month to air condition a small house here in Houston. Maybe 1 decimal place misplaced in calculations. Cost of $.20 per kilowatt hr. would be more the norm, and closeer to the higher side of average.
One other comment, 110 or 220 would not make a pump cost less to run, due to the watts being the same if a dual voltage unit.
Here is a typical pond air compressor for a pretty good sized system.
http://www.grainger.com/Grainger/items/4...20Pumps-_-4F740
