Black Skirt Tetra and Guppy Compatibility
Black Skirt Tetra and Guppy carry a clear risk: temperature ranges overlap at 72–82°F, yet temperament or size differences mean close supervision is essential. Plan on at least 20 gallons. Individual fish vary — observe behaviour during introduction.
Black Skirt Tetra vs Guppy at a glance
| Aspect | Black Skirt Tetra | Guppy |
|---|---|---|
| Adult size | ~2.5 in | ~1.8 in |
| Minimum tank | 20 gal | 10 gal |
| Temperature | 72–82°F | 72–82°F |
| pH | 6–8 | 6.8–7.8 |
| Temperament | semi-aggressive | peaceful |
| Swimming zone | middle | top |
| Group size | 6+ | 3+ |
| Care level | easy | easy |
Overlap in temperature: 72–82°F. Overlap in pH: 6.8–7.8.
Why this verdict
- Temperature: Shared range of 72–82°F.
- Water parameters: Shared pH range of 6.8–7.8.
- Temperament: Black Skirt Tetra can be territorial; provide plants, sight breaks, and space.
- Adult size: Comparable adult sizes (~2.5" and ~1.8").
- Swimming zone: Complementary layers (middle + top) reduce competition for space.
- Schooling: Group sizes matter: Black Skirt Tetra: keep at least 6; Guppy: keep at least 3.
- Tank size: Plan for at least 20 gallons to satisfy both species.
Main risks
- Occasional chasing or fin nipping is possible.
Recommended tank
Plan on 20 gallons or larger for this pair. Suitable sizes: 20 gallon High, 20 gallon Long, 29 gallon.
Group sizes: Black Skirt Tetra: keep at least 6; Guppy: keep at least 3.
Sources
- FishBase — Scientific Database · Primary / scientific · https://www.fishbase.se/
- SeriouslyFish — Specialist Publication · High authority · https://www.seriouslyfish.com/
- Aquarium Forge editorial guidelines — Editorial Interpretation · Editorial interpretation
- FishBase — Scientific Database · Primary / scientific · https://www.fishbase.se/
- SeriouslyFish — Specialist Publication · High authority · https://www.seriouslyfish.com/
- Aquarium Forge editorial guidelines — Editorial Interpretation · Editorial interpretation
- Aquarium Forge editorial guidelines — Editorial Interpretation · Editorial interpretation
Compatibility verdicts are planning guidance, not guarantees — individual fish vary. Rule version 1.1 · Data reviewed: .
Frequently asked questions
Can Black Skirt Tetra and Guppy live together?
Our verdict is “Risky”. Black Skirt Tetra and Guppy carry a clear risk: temperature ranges overlap at 72–82°F, yet temperament or size differences mean close supervision is essential. Plan on at least 20 gallons. Individual fish vary — observe behaviour during introduction.
What tank size do Black Skirt Tetra and Guppy need?
Plan for at least 20 gallons so both species have their minimum space — Black Skirt Tetra needs 20+ gal and Guppy needs 10+ gal. Adding length and cover reduces stress further.
What temperature do Black Skirt Tetra and Guppy share?
Their comfortable ranges overlap at 72–82°F. Hold the tank near the middle of that band and avoid the extremes of either species' range.
What are the main risks keeping Black Skirt Tetra with Guppy?
Occasional chasing or fin nipping is possible.
How many Black Skirt Tetra and Guppy should I keep?
Black Skirt Tetra: keep at least 6; Guppy: keep at least 3. Group sizes matter for shoaling fish — too few and they become stressed and nippy.
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