API 576J Stress Coat Aquarium Water Conditioner is a dual-action formula that instantly makes tap water safe for aquarium fish by neutralizing chlorine, chloramines, and heavy metals, while also replacing the natural slime coat that fish lose due to stress, handling, or netting. The unique Aloe Vera formula helps heal torn fins, red streaks, and wounds by promoting natural tissue regeneration. Use when setting up a new aquarium, performing water changes, adding new fish, or any time fish experience stress. Safe for use with all freshwater fish, live plants, and biological filter media. A staple product trusted by aquarium hobbyists and professionals worldwide for maintaining fish health and vitality.