That anemone is not dead, and in some cases they don't show bubbles on their tips. It's no indication of poor health. You shouldn't have added an anemone in such a new tank though. Try to keep the parameters stable as possible. Mix water in a separate container. Let it mix overnight with a power head or at least an air stone, and check the salinity with a refractometer, not a hydrometer.
Also, you should remove that gravel or whatever that substrate is. It's going to cause you issues for the life of this tank. You'll have to vacuum it constantly or you will have, at the very least, nitrate issues.