Clownfish do need a fair amount of care as opposed to other fish. You will need to provide a stable saltwater aquarium for them to live in. You need to look up the specific instructions for the type of clownfish you want to house and then adjust accordingly with your aquarium size. After you pick out the aquarium, you are going to need to find the appropriate lighting and filtration systems to place in the aquarium. You have to have a good filtration system to provide the best possible environment for the clownfish.
The aquarium should be at least 40 litres and at best 70 litres with a monitored salinity of 1.205. The best thing to give the Clown fish is real seawater and then fill the tank with natural sea sand and crushed marble. If you become really expert at keeping a tropical aquarium going, then adding a sea anemone would be nice. To complete the natural environment approximately up to 2kg of live rock can added.
You should add a sea anemone that is compatible with the species of clownfish that you pick. Clownfish have a symbiotic relationship with Sea Anemones and it is recommended that you place the two together for the best possible results. Also you can see how the clownfish interacts with the anemone. Anemones can be very hard to keep alive in the aquarium, and it is definitely not recommended for beginning aquarium owners. Sea Anemones generally do not live more than 2 years even with the experienced aquarium owner.