Can Harlequin Rasbora live with Flash Pleco (L204)?
Caution — with care
Why
- Very different sizes (Flash Pleco (L204) 20" vs Harlequin Rasbora 1.75") — these two need different tanks, and the smaller fish will be out-competed at feeding time.
- Only a narrow water hardness overlap — keep both around 6–7.5 dGH.
Sweet spot: both do well at 72–80°F and pH 6.5–7.5 — aim there.
Side-by-side
| Harlequin Rasbora | Flash Pleco (L204) | |
|---|---|---|
| Temperature | 72–80°F | 72–82°F |
| pH | 6–7.5 | 6.5–7.6 |
| Hardness (GH) | 2–12 dGH | 6–7.5 dGH |
| Adult size | 1.75" | 20" |
| Temperament | Peaceful | Peaceful |
| Min tank | 15 gal | 125 gal |
Together, plan on at least 125 gallons.
How to make it work
- Target the overlapping water-parameter range and acclimate slowly.
Sort it with: A larger tank · 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.
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Design a tank with Harlequin Rasbora, Flash Pleco (L204) →Everything compatible with Harlequin Rasbora · …with Flash Pleco (L204)