Checker Barb
Oliotius oligolepis
Min Tank Size
60L
Adult Size
5 cm
Lifespan
5 years
School Size
6+
About
Native to the rivers and streams of Sumatra and Borneo, checker barbs are one of those fish that reward a second look. At first glance they seem modest, but the metallic checkerboard pattern across their scales and the vivid red-orange fins that males develop in prime condition make them genuinely striking in a well-lit tank. Females are a bit rounder and less colorful, which makes sexing straightforward once they're mature.
They do best in soft to moderately hard water with a slightly acidic to neutral pH, somewhere between 6.0 and 7.5. Temperature is worth paying attention to because they prefer the cooler end of the tropical range, around 20 to 25 degrees Celsius. They're not demanding about water chemistry otherwise, and their tolerance for a range of conditions makes them forgiving for newer hobbyists.
Feeding is easy. They'll take flake, micro pellets, and frozen or live foods like daphnia, baby brine shrimp, and bloodworm without hesitation. A varied diet helps bring out their coloration, especially in males. They're active swimmers throughout the middle of the water column and look their best in a tank with open swimming space and some planted areas or driftwood for contrast.
One of the biggest selling points here is temperament. These are genuinely peaceful fish. They don't harass slower tankmates, don't shred fins, and get along with a wide range of community species. If you've been burned by tiger barbs before, checker barbs offer a similar look and energy without the drama.
Browse real tank builds featuring this species to see how they pair with other Borneo and Sumatran natives for a more region-specific setup.
Water Parameters
Temperature
°CpH
GH
dGHKH
dKHSwimming Level
Flow Preference
Keeping multiple Checker Barb together
Checker Barb are shoaling fish and need company of their own kind. Keep a group of at least 6. Smaller groups leave them stressed, washed-out in color, and prone to hiding.
Compatibility
Checker barbs fit into most peaceful community setups without issue. They work well alongside other small schooling fish like rasboras, smaller danios, ember tetras, and similarly sized cyprinids. Corydoras and smaller loaches make excellent bottom-level companions. Dwarf cichlids like apistogramma can coexist provided the tank is large enough and the cichlids aren't overly aggressive. Avoid pairing them with very large or predatory fish. Because they prefer cooler water, they're not ideal tankmates for discus or other species that need 27 degrees Celsius or warmer. Shrimp colonies may be picked at, particularly smaller neocaridina juveniles.
Commonly kept with
Species this one is most often paired withCommonly tried but avoid
Often paired, but shouldn't beCare Notes
The most common mistake with checker barbs is keeping too few of them. A group of three or four looks sparse, causes stress, and you lose most of the shoaling behavior that makes them interesting. Six is the real minimum, and eight or ten looks far better. They also get overlooked for cool-water tanks, which is actually where they shine. Pairing them with species that want 26 to 28 degrees pushes them toward the edge of their comfort zone over time. Keep the temperature on the lower side and perform regular water changes to maintain water quality, and these fish are genuinely low maintenance.
Behavior & Aggression
Checker barbs are about as mild-mannered as barbs get. There's occasionally some brief chasing between males, especially during spawning condition, but it rarely escalates into anything that causes visible damage. The key factor is group size. In groups under six, individuals can become noticeably more anxious or slightly snippy with each other. In a proper school of six or more, that tension disperses and you mostly just see normal shoaling behavior. They won't bother long-finned or slow-moving tankmates.
Things to Know
- Keep in groups of 6+, smaller groups cause stress and skittishness.
- Males may chase each other briefly, rarely causes injury.
- Prefer cooler temps than many tropicals, avoid warm-water tankmates.
- A tight fitting lid is essential as they are known to jump.
- Males show best color when competing; keep a mixed sex group.
Community Sightings
No builds featuring this species yet.
Be the first to feature Checker Barb in your build →Discover Tanks
Explore more builds from the community.
Explore More Species
More species to discover.
