Did you guys know that there are snail eating snails? I had no clue, but was reading it yesterday. You can order them. They will also eat plants but they say its way less as severe as the other slugs/snails.
Another thing I read is spraying them with coffee will kill them and sprinkling coffee around the plants or around in the beds will make slugs leave and if they come in contact with the coffee they will die. It has to be caffeinated coffee.