Circulation pumps

[ibfestus]

I have been to about every place I can think of but haven't come up with a make or model pump that is either: A. Economical B. practical (I live in the U.S.). So far I have tried a 192 GPH pump that sounded good on the internet but when I got it, it was a worthless POS. Then I tried a $69 sump pump and it created too much volume for the 1/4" connection. How about somebody helping out here by suggesting a make/model pump that will work with my 24 inch long 1/2" inside 3/4" copper Liebig. I have standard garden hose connections that I would be able to change if necessary. I want to recirculate water from a 30 gallon tank through the Liebig. Right now I have to run probably 150-200 gallons of water to cool the vapor to 70F in a 3 hour run and that is a problem because it is expensive for the electric that powers my deep well pump. Any help is appreciated!