Instructions
Check the tank's conditions prior to introducing the clownfish. Clownfish require a pH of 8.0 to 8.4 and a temperature of 75 to 80 F. Using a regular filter works fine as the water just needs to be moving.
Decide if you will introduce an anemone as well. These are not crucial to the fish's survival but will create a more natural setting for the fish. Anemones require high-powered lighting; also, clownfish will become territorial of them.
Consider the other types of fish in your tank, either ones in the tank now or planned for the future. Clownfish are mostly peaceful but do not get along well with other varieties of clownfish, as they become territorial. Check Live Aqauaria's species compatibility chart (see the Reference section). Also keep in mind they do not mix with larger predatory fish, such as lionfish or eels.
Introduce one or a pair of clownfish to the tank.
Monitor the clownfish in the tank to see if they or the other fish are becoming aggressive. If a clownfish is not eating well, other fish might be bullying it at feeding time or it might be sick. Be prepared to quarantine it if necessary.
How to Mix Clownfish
The Ocellaris clownfish, with its bright orange, black-and-white coloring, is widely loved thanks to the hit 2003 movie "Finding Nemo." Buying tank-raised clownfish helps protect reefs, and the species is also hardier than many others, making it a good choice for a saltwater aquarium novice. Even if you purchase tank-raised fish, care must be taken when mixing clownfish with other members of your aquarium community to avoid stressing the fish.