Monterey Sluggo Wildlife Safe Slug and Snail Killer Powder OMRI Certified for Organic Gardening 2.5 lb. helps eliminate snails and slugs. This slug control contains iron phosphate and remains effective up to 4 weeks. The slug control breaks down into organic fertilizer and can be used in the garden and around pets and wildlife. The slug control remains effective after rain and works well in cool weather. 1 lb. of Sluggo pet-safe slug killer can cover up to 1 000 sq ft.