Get some Bio-spira and you should be OK. May get an ammonia spike at first and then a nitirte spike, but should be minimal. Make sure the Bio-spira is fresh and has been kept regrigerated. I have used it twice, and it works. I am currently cycling an Eclipse 12 in my office with Tang. Shell Dwellers with some and all is well. After a week ammnia has spiked at 2 PPM and nitrites at .25.
Chris