This is a handy trick that might be useful if you're playing FarmVille 2 and all of a sudden during a mission you are asked to collect 4, 5 or 6 times the water wells. In reality should not expect but you can easily collect ten times its wells without waiting for a second
Click I like this article if you please
Make sure you have your water gauge filled to maximum
Sprinkle a single seed or tree. You have 29 drops of water in the tank.
Collect your well the first time. Your water gauge goes back up.
Sprinkle again a single seed or tree. You have 29 drops of water tank:
Collect your well again and it should be up again!