Use a fishing net to fish out the majority of the tadpoles in your pond (this is for a smaller, man-made pond).
Place these collected tadpoles in the bucket and let stand until they have dried out.
Add pond fish to your pond. These opportunistic omnivores will most likely clear out your tadpoles in a few months.
If tadpoles persist, fish out your pond fish that you wish to save and add a mixture of pesticides to the pond to kill the remaining tadpoles (only use this in a man-made, smaller pond in which you have legal right to dump pesticides).
Increase the salinity or change the pH of your pond by adding salt or chlorine.