Setting up a slug trap is a simple and non-toxic way of getting rid of unwelcome killer slugs from the garden, and not only protect your lettuces, but the family pets as well.
This slug trap also looks decorative in the garden.
Make a hole in the ground and place the trap so that only the ”house” is visible above the ground. Fill the plastic container with some beer to attract the slugs. When the slugs enter the house, they fall into the beer and drown, but have a great party whilst doing it.