The most popular type of aquarium is a freshwater system. It’s the most practical system for a beginning aquarist for several reasons.
- A freshwater system is not as expensive to set up as a saltwater aquarium
- Freshwater fish are generally less expensive than marine fish. It’s much better to work with less expensive fish when you are just starting out, and still learning the ins and outs of the hobby
- Freshwater fish are readily available at most aquarium shops and come in a wide variety of colorful species. Marine fish are much more sensitive to water conditions and don’t tolerate mistakes as easily
- You can have more fish. You can keep significantly more freshwater fish than marine fish in the same amount of space.