[Myka]

I simply use fish pellets. For a 180 I'd use about eighteen 1 mm pellets per day (1 pellet for 10 gallons) until I see ammonia, the stop adding pellets until the ammonia is gone. Nitrite isn't toxic in saltwater like it is in freshwater so I don't even own a kit. Just check nitrate once ammonia is zero to mmsee if you need to do a water change to lower nitrate or not.