I got a bottle of it before I knew better. I will say it did and still does keep my QT cycled. I added it for 7 days and dosed it with ammonia. I add ammonia once a week and its al;ways ready.
It works for some people and other it does not. I dont think it would be all that bad to try. if anything it doesnt work and you still have to do a normal cycle. Just watch your levels and test every day and youll know if its working or not.