Harlequin Rasbora
Copper-orange color finished with an unmistakable black wedge.
Harlequin Rasboras are classic peaceful community fish, prized for their copper-orange bodies and distinctive black triangular markings. A settled school moves confidently through planted aquariums and develops richer color over dark substrate. Keep six or more together.
Reference image — cultivar may vary.Imagen de referencia — el cultivar puede variar.
Photo: Foto: Representative product image
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What it needs to thrive
- Lighting
- Low to moderate. Floating plants and darker substrate help these fish display their best color.
- Flow
- Gentle to moderate with open swimming room and planted cover along the edges.
- Feeding
- Small quality flakes or micro pellets daily, supplemented with frozen baby brine shrimp, daphnia, or bloodworms.
- Temperament
- Peaceful schooling fish. Keep at least 6, with 8 or more preferred for natural behavior.
- Difficulty
- Beginner
- Ideal Tank Size
- 10 gallons and up; 15–20 gallons preferred for a full school.
- Water Parameters
- 72–80°F · pH 6.0–7.5 · soft to moderately hard water · 0 ammonia / 0 nitrite
Midwater schooling fish. Provide planted margins, open swimming space, and a secure lid.
Very peaceful. Keep in a school of at least 6 with similarly calm community fish.
Quarantine, dip, and acclimation
Quarantine
Hold all new fish in a bare-bottom 10–20 gallon QT for a minimum of 4 weeks. Observe for flashing, clamped fins, white spots, or breathing changes. Treat preventatively with copper (1.75–2.5 ppm chelated) or tank-transfer method for ich, plus a praziquantel course for flukes. Invertebrates and corals skip QT but go through dip and observation instead.
Recommended coral dip
For every new coral: a 5–10 minute bath in your reef-safe dip of choice (Bayer Complete, CoralRx, or Reef Primer) following label dosage, followed by two clean saltwater rinses. Inspect plugs and bases for flatworms, pyramid snails, and eggs — remove or refrag onto clean plugs before placing in display.
Acclimation
Float sealed bags in your QT or display for 15 minutes to match temperature. Then drip acclimate at 2–4 drops per second for 45–60 minutes until volume has tripled. Net livestock into the tank — never pour shipping water in. Dim the lights for the first 24 hours to reduce stress.
