Reduce fish stress and heal damaged tissue with API Stress Coat Aquarium Water Conditioner. Chlorine and chloramines in tap water can damage fish tissue and cause stress due to breathing difficulties. API Stress Coat Aquarium Water Conditioner reduces fish stress by 40% by instantly removing harmful chemicals and making tap water safe. It contains soothing aloe vera which is scientifically proven to reduce fish stress, heal damaged tissue and promote regeneration of tissue. It forms a synthetic slime coating that replaces the natural secretion of slime to help reduce susceptibility to disease. Use when starting a new aquarium, adding or changing water and adding fish.