API(R) Ammo-Lock(R) Water Conditioner The Aquarium Pharmaceuticals Ammo-Lock Water Conditioner is a well formulated aquarium medicine that helps to reduce the toxic substances originating from fish waste, which are released in the pond water. It also cleans the chlorine and chloramines released from tap water. Its unique blend of ingredients helps to restore gill function in the fresh water fish. Product Features: Made in the USA Well formulated Restores gill function Arrests toxic waste Item Specifications: Size: 8 oz: (237 ml) bottle Treats 474 gallons 16 oz: (473 ml) bottle Treats 946 gallons Purpose and Benefits: Works instantly, in both fresh and saltwater, to detoxify ammonia and remove chlorine and chloramines. Locks up ammonia in a non-toxic form until it can be broken down by the tank's natural biological filter. Eliminates fish stress and promotes healthy gill function.