There’s a stereotype that keeping saltwater ... freshwater aquariums instead. This clownfish variety is a hardy species and relatively docile. One will be comfortable in a 20-gallon tank.

Diet: Omnivore Size: 2.5 inches Lifespan: 5 years Water Temperature: 72 – 82 degrees Fahrenheit Ideal pH: 6.5 – 7.8 First on our list is the cory catfish, also known as corydoras or cory cats ...