Slug Patrol, part 3

Boy, these slug critters are relentless. My kale seedlings are being eaten away. I just came in after checking again with my trusty flashlight, trowel, and blue bucket of death fluid. Tonight I filled the bucket half way with water, some salt, and white vinegar. At least seven slugs were dispatched to slug hell. A couple were only slightly bigger that a pin head. They seemed to know exactly where to go. Do they have some kind of seedling radar or what? I am going to keep up this process until they are under control, if not completely exterminated from my garden. I am even thinking of more deathly potions - maybe adding ammonia to my blue bucket. This is war!