You would probably want to use at least AWG 12 wire and that would probably cost min. $300., then a decent fountain pump add another $200.
Maybe some of the electricians on here can give you a better estimate on wire size and cost.

I have a pump like this, it worked great.
http://cgi.ebay.com/4200gph-Submersible-...=item255b2a97b7
Here's another one.
http://cgi.ebay.com/Cal-Pump-PWM3900-Mag...=item256227dbc9

Last edited by adirondack pond; 05/14/11 10:02 PM.