The Catit Magic Blue Ammonia Buster is an easy-to-use device that absorbs and retains up to 80% of hazardous ammonia gases. The blue powder inside the canister is activated by contact with water, so you don’t need to add any chemicals or toxins to the litter box. The device is ideal for reducing urine odors and smells in your home, and it can be easily attached to the top of any hooded cat litter box.