of coarse Paul, it also depends on what kind of yield you can get out of yer well. For a 5-10 acre pond you'll need rain and a decent sized water shed to help you out. if you rely solely on well water, it could take a long time to fill....
Somebody help me if I am off base here but a 5 acre pond average depth of 8 feet holds over 13 million gallons of water. you get a 50 gpm well it would take over 6 months to fill it running pump 24/7..lots of electricity there.
