Clownfish are among the simplest saltwater fish to maintain an aquarium. They still need more complex care than many freshwater aquarium fish. But, their hardiness makes them a perfect “newcomer” fish for someone starting out with saltwater aquariums.
They will also eat salty food, which is uncommon for a saltwater fish. However, you will need to be sure they get a varied diet. Most pet stores carry these kinds of food. They also require some veggies in their diet including spinach and nori. You may get nori at specialty grocery stores. A varied diet ensures that clownfish get all of the nutrients that they need.
Clownfish need a tank having a capacity of at least 30 gallons. The tank should have lots of hiding places for the fish to help them feel secure. Clownfish can flourish in both fish-only and reef setups, though the former is much less of a struggle for starting saltwater hobbyists. Their water must remain between 74 to 78 degrees Fahrenheit and have a specific gravity of 1.020 to 1.024.
Clownfish don’t need anemones to survive or even thrive. In actuality, anemones can be more fragile and difficult to care for than the clownfish themselves. Various species of anemone have their own specific requirements for things like light, feeding, and substrate. Some hardier anemones that sponsor clownfish incorporate the beaded anemone (Heteractis aurora) and the glue anemone (Cryptodendrum adhaesivum). Sometimes, in the absence of sea anemones, clownfish make take particular corals, such as Xenia polyps, as hosts.
Most clown fish won’t harm other fish but are small enough that they might be in danger from bigger tank-mates. Clownfish will even leave invertebrates alone, which makes them good candidates for a reef tank. Just 1 clownfish, the maroon clownfish (Premnas binucleates) can be competitive, and should only share a tank with large, hardy fish of roughly exactly the same dimensions (four to six inches).