A little more detail would be helpful. Like tank size, filtration, etc.
I have a 125 I recently cycled with a large shrimp and just left it there until it was gone. Smaller tank, less shrimp. Many will tell you patience is better than trying to speed things up with bottled solutions. There seems to be a bottle for every problem today, when good water management practices actually are the best long-term solution. Patience my friend.