You have already got many ...

Published by

You have already got many answers, but very important issue is the distance between two wells, usually well should be at least 500 meters away from another, else while pumping cone of depression goes down and poorly installed well affected with low yield and extra drawdown. 

If same pump using for two wells, the second was defenitly installed wrongly, could be filters placement were not in right layers. You can stop the good one for few hours and run only the bad performing one and observe what is going on, if it gives almost the similar result no doubt of installation fualt.