The friendliest place on the web for anyone with an interest in aquariums or fish keeping!
If you have answers, please help by responding to the unanswered posts.
I have used it once or twice. It works fairly well in emergencies. It will change ammonia to ammonium a less toxic form. That said, water changes during cycling, or an ammonia spike are the best route to take. Prime will also help detoxify ammonia temporarily.