Solar Powered Water Fountains Solar Powered Fountain For Waterfall?

Solar powered fountain for waterfall? - solar powered water fountains

I'm looking for one of these on eBay

http://cgi.ebay.com/Solar-Powered-Water-Pump-With-Panel-Pond-Fountain_W0QQitemZ250240735285QQihZ015QQcategoryZ115710QQtcZphotoQQcmdZViewItemQQ_trksidZp1742.m153.l1262

would be good for a very small pond? My pond bottom is a bath of 18 gallons, and I want to pump water to 3 feet and say with one foot on the ground with my upper pond only ... one gallons would be enough energy to maintain a constant go?