I agree with the comments above...just a few things to add. Have you thought about going with a slightly large tank than an 16 gallon. The problem with smaller tanks especially in saltwater is they tend to be a little harder to work with than a larger tanks (just suggesting since you said your new) and can get frustrating and turn people off to the hobby. Also I would suggest that you get a refractometer rather than a hydrometer as the later can be inaccurate and its inaccuracy can increase over time.