Instantly removes chlorine and chloramines, making tap water safe for fish. Neutralizes heavy metals. Also, replaces the natural slime coating fish need in times of stress, such as handling, shipping or fighting. Contains Aloe Vera, nature’s liquid bandage, to prevent the loss of essential electrolytes and protect damaged tissue against disease-causing organisms. Helps heal torn fins and skin wounds. Use when setting up aquarium, changing water, or adding fish.