Can Opaline Gourami live with Harlequin Rasbora?
Light caution
Why
- Opaline Gourami is large enough to threaten a small Harlequin Rasbora — usually fine once both are adult, but watch new additions.
- Opaline Gourami is semi-aggressive — give the peaceful Harlequin Rasbora plenty of space, cover and broken sight lines.
Sweet spot: both do well at 72–80°F and pH 6–7.5 — aim there.
Side-by-side
| Opaline Gourami | Harlequin Rasbora | |
|---|---|---|
| Temperature | 72–82°F | 72–80°F |
| pH | 6–8.5 | 6–7.5 |
| Hardness (GH) | 5–20 dGH | 2–12 dGH |
| Adult size | 6" | 1.75" |
| Temperament | Semi-aggressive | Peaceful |
| Min tank | 30 gal | 15 gal |
Together, plan on at least 30 gallons.
How to make it work
- Use a larger, well-decorated tank with sightline breaks, keep everyone well-fed, and add the calmer fish first.
Sort it with: GH remineraliser
Where to buy
- Harlequin Rasbora: buy at The Shrimp Farm · The Shrimp Farm live-arrival guarantee
Live-animal shipping: add a heat pack below 50°F, expect weather holds above 90°F, and schedule delivery for a moderate week when someone can receive it promptly.
Design the whole tank, not just the stocking
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Design a tank with Opaline Gourami, Harlequin Rasbora →Everything compatible with Opaline Gourami · …with Harlequin Rasbora