User blog:Purplepoweraide13/clearing the corruption

hi um im trying to clear the corruption for an all hallow world but the corruptors keep on turning it back into corruption and i dont know how to clear underground corruption.

plizz help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!