12 hours of fresh breath. Tropiclean’s natural water additive is developed to provide dogs and cats with essential daily oral hygiene care. Without proper dental care, 70 percent of dogs and cats start to show signs of oral disease by age 3. Oral disease can eventually lead to tooth loss or other serious health problems. Tropiclean’s natural water additive promotes healthy gums and eliminates bad breath for up to 12 hours.