If you just filled it, you can kiss "stable" goodbye. It still needs to cycle, and Live Rock is a great way to help that happen. I would highly recommend getting some now - perhaps even uncured.
You haven't added fish yet, have you? If so, consider getting them out, and adding a raw shrimp to help get the cycle going.
You should see your ammonia spike, then nitrites, then nitrates, When ammonia and nitrites go back to zero, and nitrates are close to zero, your tank has cycled, and then you can very slowly begin to add to the tank.
This may take some time to complete.