With the cured liverock you have, I'm not surprised your readings are all normal. That happens with good cured rock, you see very little if any at all, of a spike. With the addition of uncured liverock though, you will see a spike in your parameters that may last only a few days to a few weeks depending on how quickly your already established bacteria can break it down. If you don't have any fish or inverts in the tank, I wouldn't worry and just let it ride itself out. If you have livestock in the tank, you'll want to watch the parameters closely and do partial water changes to keep the numbers down and your tank as stress free as possible for you fish and/or inverts.
Salifert is a good brand. Mardel, are these testing strips? If so, I would look into a liquid test kit, they are much more accurate. Also, the deep 6 hydrometer can give low readings on salinity. A refractometer is a much better tool for measuring your salinity. With nothing in your tank, your salinity is fine at 1.022. Fish will be ok with that as well. Inverts would appreciate a higher salinity in the range of 1.023-1.025. If your considering corals, you'll want to have your salinity at around 1.025 also.