Can Harlequin Rasbora live with Three Spot / Blue Gourami?
Caution — with care
Why
- Three Spot / Blue Gourami is semi-aggressive and may bully the peaceful Harlequin Rasbora — give lots of space and cover.
- Three Spot / Blue Gourami is large enough to threaten a small Harlequin Rasbora — usually fine once both are adult, but watch new additions.
Sweet spot: both do well at 73–80°F and pH 6–7.5 — aim there.
Side-by-side
| Harlequin Rasbora | Three Spot / Blue Gourami | |
|---|---|---|
| Temperature | 72–80°F | 73–82°F |
| pH | 6–7.5 | 6–8 |
| Hardness (GH) | 2–12 dGH | 5–19 dGH |
| Adult size | 1.75" | 5" |
| Temperament | Peaceful | Semi-aggressive |
| Min tank | 15 gal | 30 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 → Aquarium Co-Op
Where to buy
- Harlequin Rasbora: buy at Flip Aquatics · Flip Aquatics live-arrival guarantee
- Three Spot / Blue Gourami: buy at Flip Aquatics · Flip Aquatics 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.
Build a full tank around this stocking →Everything compatible with Harlequin Rasbora · …with Three Spot / Blue Gourami