Ya its not the water. There is very little free floating bactera inthe water that consumes the ammonia and nitrite. Its the substrate, rock and even the glass walls of your tank where these bactera live. We have some members in KC im sure. Hopefully some of them will find this thread and you can get a cup of their sand. This is one of the easiest ways to start the cycle process. If your going to put live rock in your tank nows the time. You can use the rock to cycle the tank aswell.
Patience is important in a SW
tank so please dont try to rush it. Rushing the tank will only cause significant headache and pocketbook pain later down the road.