API STRESS COAT Aquarium Water Conditioner Contains one (1) API STRESS COAT Aquarium Water Conditioner 16-Ounce Bottle Makes tap water safe and protects fish with dual-action formula Removes chemicals from tap water that are harmful to fish Replaces fishs protective coat damaged by handling, shipping or fish fighting with healing power of Aloe Vera extract Use when adding or changing water, when adding new fish and when fish are sick or injured