13.5 might be tough to keep stable for a first tank, and you will likely be more limited in fish than you think. If you are just testing the waters for a bit before going big that is fine. I started with a 55g and lasted 2 years before upgrading to a 180g… would’ve been much quicker if I started small!That is true! I’m gonna end up getting the Fluval Evo XII 13.5 gallon salt water kit.