![]() The water should be slightly acidic, with a pH of 6.0 to 8.0, and hardness between 3 to 18 dGH. The substrate that Congo tetras are used to in their natural habitat consists of sand and mud, which can be easily replicated in a tank. Tank ConditionsĬongo tetras require a lot of space for free movement, so you should consider at least a 20-gallon tank but ideally aim for 30 gallons. In a large and spacious tank, Congo tetras will showcase their beautiful rainbow colors in all their glory.Ĭongo tetras are a tropical species and need warm water from 73☏ to 82☏. You should keep a water heater near the tank in case you live in a climate where temperatures can drop to keep the water in the tank consistently warm and prevent diseases. You can use either plastic plants or fresh ones since both options will look good in the tank. However, keep in mind that fresh plants will keep the water fresh by adding oxygen to the environment of the aquarium. Typically, Congo tetras will get along with a variety of other peaceful fish, but will not be comfortable living with any aggressive fighting species. Congo tetras are easily scared and do not respond well to bright light or loud noises. They need caves and plants in the tank to hide in if they sense danger. ![]() Typical BehaviorĬongo tetras are peaceful and calm fish that feel most comfortable in groups of their relatives. Having several Congo tetras in your tank will not only give your fish peace and protection but will also make your tank that much brighter with their shimmering rainbow colors. During the day, when these fish are most active, Congo tetras will group together and swim around the tank together, occasionally separating to explore. Compared to females, the males often have a more outstanding dorsal fin, which they tend to use to their advantage in mating rituals.Īdult males may reach up to 3.5 inches (8.5 cm) in the longest part of their body, while females are smaller, up to 2.75 inches (6 cm) in length. This size makes the Congo tetras larger than other tetra fish (such as the green neon tetra fish that is usually less than an inch in length). The Congo tetra species, as the name suggests, has a characteristic tetra shape, reminiscent of a triangular pyramid, covered in large scales. These fish are easily recognized by their beautiful fins, especially the almost transparent, violet-and-gray tails.
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