Rosy Barb
Pethia conchonius
The Rosy Barb (Pethia conchonius) is a peaceful fish that's easy to keep. Give it a tank of at least 110 litres (29 US gallons), water held at 59-75°F, and a pH of 6-7.5. Always keep a group of at least 6 - they feel safest in numbers.
Captive lifespan reflects typical experience in a home aquarium, not maximum recorded age; genetics, sourcing, and care vary.
Natural distribution
South Asia
- East & Southeast Asia
Regional colours match the stocking calculator's origin map.
Rosy Barb Tank Setup
Give them a tank of at least 110 litres (29 US gallons). As open-water swimmers they care more about swimming length than height, so a longer tank is ideal. Keep the water at 59-75°F with a pH around 6-7.5, and avoid sudden swings. Always keep a group of at least 6 of their own kind - kept alone or in pairs they tend to turn shy, nippy, or wash out in colour.
What Do Rosy Barbs Eat?
They're not fussy eaters - feed a varied diet, rotating good-quality dry, frozen, and gel foods rather than the same thing every day, and match the food size to their mouths.
Rosy Barb Tank Mates
May nip fins; avoid long-finned tankmates The Rosy Barb is peaceful, which is the first thing to weigh up when you choose tank mates. It's a known fin-nipper, so avoid bettas, guppies, and other slow, long-finned fish. It's a shoaling fish, so settle a group of 6 or more of its own kind before adding anything else - a stressed, lonely fish is far more likely to nip or hide. Before you buy, run your full stocking list through our stocking calculator. It weighs temperament, adult size, and water needs together, which a single species page can't do on its own.
Are Rosy Barbs Good for Beginners?
Often recommended to beginners, but only after the tank is cycled and you can keep a proper school - not three fish in a new setup.
Rosy Barb - frequently asked questions
What size tank do Rosy Barbs need?
Rosy Barbs need a tank of at least 110 litres (29 US gallons). A bigger tank is always easier to keep stable, and gives them more room to settle in and behave naturally.
How many Rosy Barbs should I keep together?
Keep a group of at least 6. Rosy Barbs are a shoaling species and become stressed, lose their colour, or hide when kept singly or in pairs.
What water parameters do Rosy Barbs need?
Keep them at 59-75°F with a pH of 6-7.5, steady rather than chased to an exact figure. In a cycled tank, ammonia and nitrite should both read 0 ppm, with nitrate kept low through regular water changes.
What do Rosy Barbs eat?
Rosy Barbs are omnivores and aren't fussy eaters. Feed a varied mix of good-quality dry, frozen, and gel foods, and match the food size to their mouths. Feed small amounts once or twice a day, and remove anything they don't eat.
Are Rosy Barbs good for beginners?
Yes - Rosy Barbs are a good beginner choice once the tank is fully cycled and you can keep a proper group. They are hardy but still need stable water and a school to feel secure.
Common mistakes with Rosy Barbs
- Buying fewer than 6 - Rosy Barbs need a proper school to feel secure; isolated individuals hide, fail to colour up, or become stressed.
- Underestimating tank size - the minimum footprint is 110 litres (29 US gallons); impulse buying into a smaller tank leads to stress and shortened lifespan.
- Mixing with long-finned fish - Rosy Barbs will nip at bettas, angelfish, and other fish with flowing fins, causing stress and infection risk.
Building a community? Run the full list through the stocking calculator before you add anything else.
Great tank mates
Chosen from temperament, overlapping temperature/pH bands, plausible minimum tank footprints, and size versus yours in App-aquatic data. Hobby nuance always wins - verify stocking and temperament before purchasing.
Fish to avoid mixing with Rosy Barbs
These well-known species are commonly sold alongside this fish but are not recommended tank mates - verify before purchasing.
- OscarPredator - Oscar will eat or injure smaller tank mates
- AxolotlPredator - Axolotl will eat or injure smaller tank mates
- Betta (Male)Predator - Betta (Male) will eat or injure smaller tank mates
