Jumpstart your set-up process and add your new finned friends to fresh and saltwater aquariums instantly with API Quick Start Aquarium Water Conditioner. This formula contains unique, patented bacteria that starts removing ammonia and nitrites on contact, so fish can be added immediately. It is scientifically tested to help consume these harmful chemicals, and may make it easier and faster to move your fish into the aquarium. It can also be used during water or filter media changes, after medicating or when ammonia and nitrite are detected.