AMMO-LOCK is scientifically proven to protect fish cells against ammonia Benefits: Detoxifies ammonia in aquariums Works instantly Follow API Easy Care Guide and use AMMO-LOCK when: Addressing Water Solving Problems to neutralize the ammonia If the aquarium tests positive for ammonia, act quickly by doing a partial water change and then neutralize the ammonia. Ammonia is toxic to fish cells, especially the gills. AMMO-LOCK is a liquid treatment proven to protect fish cells from ammonia. AMMO-LOCK works instantly, in both fresh and saltwater aquariums, to detoxify ammonia and remove chlorine and chloramines. AMMO-LOCK 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. Treats: 5ml treats 10 U.S. gallons of aquarium water Directions: Use the API Dosing Cap on the Bottle. Add 5ml per 10 U.S. gallons of aquarium water. Continue to add AMMO-LOCK every 2 days until ammonia is not detected. If, after 7 days, ammonia is still present, perform a partial water change, service your biological filter and reduce feeding. Tip: AMMO-LOCK does not remove ammonia; it converts it to a non toxic form. After using AMMO-LOCK, your aquarium water will still test positive for ammonia even though it is in a non toxic form which will be removed by the biological filter.