Home
/
Fish species
/
Congo Tetra
Congo Tetra
Origin
Congo
Habitat Size
50-150 Liters
Water Type
Fresh Water
Water Temperature
23º-28ºC
Cost in India
₹80 - ₹150
Size
3 - 3.5 inches (Small)
Diet
Omnivore
by Happy Pet TeamUpdated on 2 Dec 2025
Congo Tetra Fish Guide
The Congo Tetra (Phenacogrammus interruptus) is a dazzling freshwater fish known for its shimmering, rainbow-like body colors and long, flowing fins, especially in the males. It’s quite popular among fish hobbyists for its lively schooling behavior and striking appearance.
One unique feature: the male develops a tail fin with an elegant middle extension and white-edged fins, which make it stand out in a group.
Congo Tetra Origin
- The Congo Tetra comes from Africa—specifically, the central basin of the Congo River Basin in what is now the Democratic Republic of Congo.
- In the wild, they live in slow-moving rivers, pools, and tributaries, often with vegetation around and slightly murky or tannin-rich water.
Temperament
- Generally peaceful and schooling—these fish feel safe and display their best behavior when kept in a group.
- Because they are somewhat large compared to many tetras and have long fins, they can become stressed if kept with very aggressive or fin-nipping fish.
Congo Tetra Compatibility
Good tank mates:
- Other peaceful fish of similar size, such as:
- Neon Tetras
- Corydoras
- Rainbowfish
- Celestial Pearl Danio
- Ember Tetras
- Mollies
- Chili Rasbora
- Dwarf Cichlids (aka Apistogramma)
To avoid:
- Fin-nipping species (they may damage the long fins of Congo Tetras)
- Very small fish that could be stressed or compete poorly in a school of these
- Overly aggressive fish that chase or dominate them
Congo Tetra Price in India
- In India, a single Congo Tetra (imported size ~2.5″) is around ₹ 650.
- Pairs (male + female) sometimes at ~ ₹ 1,150 in Indian markets.
Characteristics
Temperament
Aggressive
Friendly
Compatibility with other fishes
Not Friendly
Super Friendly
Habitat Size
Small
Large
Congo Tetra Habitat Requirements
Initial Setup Cost
₹4,000 - ₹12,000
Water Temperature
23º -28ºC
Water Type
Fresh Water
PH Level
6 - 7.5
Tank Type
- Freshwater tropical fish
Congo Tetra Aquarium Size
- Minimum recommended for a small shoal: around 30+ gallons (≈ 120+ liters) for best results.
- Longer tanks (so the fish can swim more) are better than very deep or tall ones, because they are active swimmers.
Water Conditions
- Temperature range: ~ 24–27 °C (75–81 °F) is ideal.
- pH level: Slightly acidic to neutral: about 6.0 to 7.5.
- Water hardness (GH/KH): Moderate softness preferred, but fish will adapt. For example, GH ~3-18 °dGH reported.
Congo Tetra Environment Needs
- Plenty of open swimming space + scattered plants around edges/back.
- Substrate: Natural look—sand or fine gravel, maybe darker to highlight the fish’s colors.
- Lighting: Moderately low to moderate light, as too bright light may stress them or hide their colors.
- Decor: Some hiding places (plants, maybe driftwood) so the fish feel secure when schooling. But avoid cluttering the middle open space too much.
Essential Equipment
Aquarium tank
Water filter
Heater
Light
Congo Tetra Nutritional Guide
Avg Monthly Expenses
₹80 - ₹ 150
Diet Type
- Omnivore: They will eat a mix of meat-based foods and some plant/vegetable matter.
Congo Tetra Suitable Foods
- Quality flake or pellet food formulated for tropical fish.
- Frozen or live foods: e.g., brine shrimp, bloodworms, daphnia. These help bring out full color.
- Occasionally, some vegetable content or micro-pellets with plant matter.
Feeding Frequency & Tips
- Feed once or twice a day, only as much as the fish can eat in a couple of minutes.
- Overfeeding can pollute the water, which these fish don’t like.
- A varied diet will help maintain their health and vibrant colors.
- Remove any uneaten food after feeding to preserve water quality.
Congo Tetra Health & Care
Common Health Issues
Fin rot
White spot / ick
Velvet disease (yellowish-brown spots on the skin)
Swim bladder disease
Fungal infections
Bacterial infections
Signs of good health
Active
Bright coloration
Good apetite
Signs of sickness
Loss of appetite
Lethargic behaviour
Tattered fins
White growths
Swim bladder issues
Like most aquarium fish, Congo Tetras are susceptible to many of the typical diseases, such as:
White Spot Disease (Ich)
The parasite makes little white spots appear on the body and fins. Infected fish may scratch surfaces or rub against them, swim in an erratic manner, and stop the action of eating. It is treated via raised water temperatures, anti-ich medications, and good water quality. As the Congo Tetra requires high water quality, it is often a water quality issue.
Fin Rot / Finned Damage
Fin damage may also occur due to sharp decorations, aggressive tankmates, or poor water conditions. This will be displayed by ragged fins, eroded edges, or areas that are becoming discolored. It is advisable to maintain good water conditions (by regular water changes), ensure peaceful tankmates, and consider antibacterial treatment if required.
Stress-Related Colour Fading & Hidden Behaviour
In less than ideal conditions (such as being overlit, not being shoaled, or in a tank that is too small or not with the right chemistry), the Congo Tetra may appear: to lose its colors, be less active, to hide more, or to be more prone to disease, however good stable water, keeping a school and providing a comfortable environment will help.
Congo Tetra General Health Tips
- They thrive in groups containing 6 to 8 members. Natural behaviors are seen in those groups.
- Change water each week or two and test for ammonia, for nitrite, and for nitrate.
- Isolate new fish to lessen disease spread.
- Moderate light, with a calm and steady environment, and a good diet are sufficient to maintain the colors and fins of these fish.
Prerequisites for a Fish
Adequate tank space
Cleanliness
Effort & commitment
Enriching Environment
Written by
Happy Pet TeamAuthor
Team Happy Pet is a passionate collective of pet experts, enthusiasts, and advocates dedicated to sharing trusted and insightful content.
Our cont
Frequently Asked Questions
Are Congo Tetras suitable for beginners?
Yes, Congo Tetras are suitable for beginners. They are hardy and have moderate maintenance requirements, making them a good choice for novice aquarists.
Can Congo Tetras live with other fish?
Yes, Congo Tetras are peaceful fish and do well in community tanks with other non-aggressive species. Ideal tank mates include other tetras, rasboras, and small catfish.
What do Congo Tetras eat?
Congo Tetras are omnivores. They thrive on a varied diet that includes high-quality flake food, frozen foods (such as bloodworms and brine shrimp), and occasional live foods. Adding vegetable matter like blanched spinach or spirulina can enhance their health.