Make sure you stabalize your saline at 0.23 parts per million.
For the ammonia: Either dump in some cheap fish to get it dirty, or just dump in ammonia (best for saltwater). You need to build up bacteria in the tank. Personally, i would just dump some common ammonia in there, and let it run for a couple weeks.
That is how you cycle your tank. If you don't do it, not a single specimin will survive.
Dump ammonia..........then do 20% water changes weekly.