Compatibility Overview
Electric Yellow Cichlid and Harlequin Rasbora can potentially coexist, but the combination requires careful attention. Some combination of water parameter differences, size mismatch, or temperament issues make this pair challenging. A larger tank (minimum 55 gallons), dense planting, and close monitoring are essential.
| Factor | Electric Yellow Cichlid | Harlequin Rasbora | Verdict |
|---|---|---|---|
| Temperature | 75–82°F | 72–81°F | ✅ 75–81°F |
| pH Range | 7.5–8.5 | 5.5–7.5 | ⚠️ 7.5–7.5 (narrow) |
| Temperament | aggressive | peaceful | ❌ Risk |
| Adult Size | 2.4 in | 1.75 in | ✅ Similar |
| Min. Group | 1+ | 8+ | See below |
| Min. Tank Size | 55 gallons (for both species) | — | |
✅ Compatibility Positives
⚠️ Caution Points
Species Profiles
Electric Yellow Cichlid — Aquarium species
The Electric Yellow Cichlid is a popular freshwater species known for its striking yellow coloration and moderate aggression. It requires a spacious tank with hiding spots and is best kept with peaceful tankmates. This species is suitable for beginner aquarists.
→ Full Electric Yellow Cichlid care guide
Harlequin Rasbora — Trigonostigma heteromorpha
Active mid-level schooling fish with a distinctive black triangular patch. One of the best all-around community tank fish.
Frequently Asked Questions
Can Electric Yellow Cichlid live with Harlequin Rasbora?
With significant caution and a larger tank. Electric Yellow Cichlid and Harlequin Rasbora can potentially coexist, but the combination requires careful attention. Some combination of water parameter differences, size mismatch, or temperament issues make this pair challenging. A larger tank (minimum 55 gallons), dense planting, and close monitoring are essential.
What tank size do I need for Electric Yellow Cichlid and Harlequin Rasbora together?
A minimum of 55 gallons is recommended for keeping Electric Yellow Cichlid and Harlequin Rasbora together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Electric Yellow Cichlid and Harlequin Rasbora?
75–81°F
Is a Electric Yellow Cichlid aggressive toward a Harlequin Rasbora?
Electric Yellow Cichlid is aggressive and Harlequin Rasbora is peaceful. Their preferred pH ranges are difficult to reconcile.
Related Compatibility Guides
Compatibility score breakdown
The overall score is weighted across water chemistry, behavior, adult size, swimming zone, and social needs. A score is a planning aid—not a guarantee for individual fish.
| Factor | Score |
|---|---|
| Temperature | 86/100 |
| Ph | 0/100 |
| Temperament | 30/100 |
| Adult Size | 100/100 |
| Swim Zone | 68/100 |
| Social Needs | 92/100 |
Tank size scenarios
Use the scenario that matches the actual group sizes and temperament you plan to keep.
| Scenario | Tank | When it applies |
|---|---|---|
| Minimum viable | 55 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 75 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 125 gal | Best when keeping larger schools or reducing territorial pressure. |