With temperatures slowly dropping outside, now is the perfect time to start weatherizing your saltwater aquarium. The best thing you can do to is clean your heaters and make sure they are in good working order. If they aren’t, then be sure to replace them before it gets too cold. A good set of heaters will keep the tank running at optimum temperatures and will prevent tank temps from fluctuating wildly. It’s also a good idea to get a generator, especially if you’re located in areas that experience a lot of ice. Snow storms are notorious for causing power outages, and no power to the heaters would cause temperatures would cause an intense drop in tank temps.