This is a magic powder made from crushed fossilized algae. To a slug, it’s like crawling through broken glass. Sprinkle a thin line along baseboards or under sinks. It dries them out and they peacefully crumble into dust.
Make sure to buy food-grade diatomaceous earth—the other kind is for pools and will ruin your day. Wear a mask when sprinkling; you don’t want to breathe in mini fossil fragments.
It’s safe for pets and kids once dry. Slugs will avoid it like a final exam.
