if your tank had no ammonia source for those first 2 weeks then it was not cycling. you need to add a source of ammonia to start a cycle. if you've had fish in there for one week, the cycle could take anywhere from 3-6 more weeks to finish. it usually takes longer with fish because you have to do daily (sometimes twice daily) PWC
's to keep levels safe for your fish. don't let ammonia go above .25ppm (or it will start to burn their gills and cause permanent damage--left unchecked too long and they will die) or nitrite go above .5ppm or so (it will poison their blood and also cause permanent damage if not death) and nitrates should be under 40ppm (you will not see nitrate until near the end of the cycle).
EDIT: ok, just realized you have salt water. not sure if the same levels apply (i think nitrate is the only thing that will be different). sorry bout that.