API Stress Coat makes tap water safe for fish by removing harmful chemicals from tap water, and contains the healing power of Aloe Vera to reduce fish stress by 40% and to heal damaged tissue and wounds. API Stress Coat also reduces electrolyte loss in your fish, and should be used when: •Handling, netting, or adding fish to a bag for the trip home from the store; •Starting an aquarium; •Performing monthly water changes; •When adding new fish to your aquarium. API Stress Coat is more than just a tap water conditioner! Our unique formula is scientifically proven to reduce fish stress and heal damaged tissue by forming a synthetic slime coating on your fish, replacing the natural secretion of slime that is interrupted by handling, shipping, fish fighting, or other forms of stress. API Stress Coat also helps reduce fish susceptibility to disease and infection, and reduces electrolyte loss. It may be used any time in your aquarium, but should always be used when starting a new aquarium, adding or changing water, or adding fish.