PisciDex Species Profile
Harlequin Rasbora
Hardy peaceful rasbora that shows best in groups with subdued light, plants, and open swimming space.
Trigonostigma heteromorpha
Danionidae | Southeast Asia | Malaysia, Singapore, Sumatra, and Borneo
Core Requirements
Tank Size
20 gallons minimum
Adult Size
2 inches
Group Size
Group 8+
Bioload
2/10
Water Parameters
Temperature
73-82 F
pH
6-7.5
Plant Safe
Yes
Invert Safe
Yes
Data Confidence
medium
Temperature note: Recommended and tolerated temperature ranges currently match the primary care profile.
Behavior & Husbandry
Temperament
Peaceful
Aggression
1/10
Diet
Omnivore
Difficulty
Easy
Lifespan
5 years
Breeding
Intermediate
Schooling
Yes
Compatibility Tags
CommunityPeacefulSchoolingMid WaterPlant SafeInvert SafeBeginner FriendlySoftwaterBlackwater
Similar Species
Species Compatibility
Database-driven compatibility notes for planning community aquariums.