I would like to supplement my small pond(1/4) with well water this summer but wish not to expend a lot of money on a submersible pump or a new jet pump. I have a 90 ft well with 4 inch casing about 100 ft from my pond. Its 50 ft to the water level with 35 ft of water to the bottom of the well. I wish to pump enough water to replace part of the evaporate in the next months. I like the ideal of airlift pumps. My well does not have enough depth of water to accomplish this but I came across this pump called the Geyser http://www.geyserpump2.com/well.htm
Does anyone have any knowledge about this. Looks pretty simple to build if I can find just a bit more info. Thanks for any help.