be cautious about using any ammonia reducing additives as they only mask the problem....as you have read, your system is still in its infancy and needs time to mature, by adding all that livestock your only adding to the bio load, its like feeding a chunk of steak to a new born. I would follow hobogato's advice and give your tank time to mature, and the best sound advice in this hobby is patience and don't rush things......I could foster your lion fish for you in my FOWLR tank.....good luck.

alfred