It's a waste of money. Doesn't do anything. Go back to the store and look for Stress Zyme. I've had good results with it, cycling in under 2 weeks. It's not for an instant cycle like Bio-Spira, but will shorten your cycle time. Or look for Bio-Spira as mentioned above.
55G Filstar XP3 - 16" Fire Eel
75G Medium Planted - Filstar XP3 Low Light - Established Feb 2006