If you are looking to have your very own at-home aquarium, the very first decision you should make is if you want a saltwater or freshwater tank. There are pros and cons to each, and neither option is better than the other. It all depends on what you want from your tank as a fish owner.
Before we begin, something to note is that saltwater is found in the oceans around the world, while freshwater is usually found in rivers and lakes. This impacts how the water differentiates and how the maintenance is different between the two.