The Cardinal tetra is a very popular aquarium fish, but often confused with the Neon tetra.
Both Cardinal tetras and Neon tetras feature an iridescent blue line that bisects the body of the fish. Under this line, you will see a lateral red stripe where Neon Tetras will end halfway from the tail and Cardinal tetra continue much longer.
The Cardinal tetra will grow up to 3-5 cm long and does not require a large aquarium. Even a small 20 liter aquarium can comfortably house a Cardinal tetra.
Set up an aquarium with lots of plants with some open swimming space. Cardinal tetras should always be kept in groups consisting of at least ten Cardinal tetras. Keeping a single Cardinal tetra is not a good idea. They feel better in a group. This helps to reduce the stress and shy in them and also bring out the natural color of the fish. The Cardinal tetra is a good choice if you are looking for fish that will occupy the top and mid part of the aquarium.
They are friendly and peaceful, ideal to add into a community aquarium. They accept most type of foods.
The conditions in the aquarium should ideally be soft water (2 – 6 dGH) with pH of 4 – 7.5; water temperature is 20-29 degrees Celsius.
The Cardinal tetra is sensitive when it comes to water quality. Nitrate must keep at a low level. Frequent water changes should be carried out and food should never be left uneaten in the water.
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