Fritz Aquatics 80256 Fritzguard Water Conditioner/Dechlorinator for Fresh and Salt Water Aquariums, 16-Ounce Works in seconds to neutralize chlorine, chloramines, and heavy metals present in tap water that can be harmful to fish Use when adding or changing water, when adding new fish and when fish are sick or injured Reduces stress & promotes healing with aloe and Vitamin E Enhances nitrification and provides electrolytes Use 1 tsp (5 ml) per 10 U.S. gallons (38 L)