Freshwater vs saltwater aquarium? If you’re thinking of getting an aquarium, this is one of the first decisions you’ll need to make. While both can be rewarding and beautiful, there are some ...

For beginners, Jeffers recommends a 5-gallon freshwater tank, which can often hold one betta fish, for example. For someone ...

As seawater creeps further into coastlines, salt threatens to pollute the freshwater reserves that people depend on. But this ...