Ammo Lock has been scientifically proven to protect fish against ammonia. If your aquarium has tested positive for ammonia, conduct an immediate partial water change and then neutralize the ammonia using Ammo Lock. It can be used in both fresh and saltwater aquariums, acting to detoxify ammonia and remove chlorine and chloromines from your water. Working instantly, Ammo Lock binds ammonia into a non toxic form until it can be broken down by your tank's biological filter, eliminating fish stress and promotes healthy gill function.