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STATUS: CAUTION REQUIRED ⬌ MATRIX CORRELATION INDEX

Can you keep Angelfish and Black Skirt Tetra together?

Algorithmically generated environmental and behavioral compatibility report.

AngelfishPterophyllum scalare
mid Layersemi-aggressive
warning
Black Skirt TetraGymnocorymbus ternetzi
mid Layerpeaceful
CAUTION REQUIRED

Algorithmic Assessment

Behavioral caution. Angelfish is semi-aggressive and may bully, chase, or nip the fins of the peaceful Black Skirt Tetra. Ensure the tank is large and heavily decorated.

Scientific Parameter Comparison

Cross-reference water chemistry, temperature range envelopes, and physical dimensions of Angelfish and Black Skirt Tetra.

Parameter MetricAngelfishBlack Skirt TetraCalculated Overlap
Temperature Range75°F – 82°F70°F – 85°F75°F – 82°F
pH Chemistry6.0 – 7.56.0 – 7.56.0 – 7.5
Min. Tank Capacity30 Gallons15 Gallons30 Gallons (Minimum)
Aquatic Strata ZonemidmidShared Zone (Layer Conflict)
Adult Size (Max)6.0" (15 cm)2.5" (6 cm)Ratio: 1 : 2.4

⚠ Cohabitation Precautionary Guidelines

These species can technically live together, but you must take careful mitigation steps to ensure success:

  • Visual Boundaries: Add dense foliage, driftwood roots, and hollow decorations to break sightlines and provide escape cover for the submissive species.
  • Volume Dilution: Ensure the tank capacity exceeds the standard minimums (30G) to dilute territorial boundaries.
  • Feeding Protocol: Feed in multiple separate corners of the tank simultaneously to reduce food-related aggression.

⚔️ Do Angelfish and Black Skirt Tetra Fight?

Caution is required due to semi-aggressive behavior. The Angelfish displays minor territorial behaviors and may chase or stress the Black Skirt Tetra, especially in smaller tanks. Cohabitation is only possible if you provide ample hiding spaces, breaks in line-of-sight, and separate feeding zones.

🍽️ Swimming Layers & Feeding Competition

To satisfy their dietary requirements, offer a varied feeding schedule. Sinking pellets or wafers are ideal for bottom dwellers, while floating flakes or micro-granules support mid and top dwellers. Both species reside in the mid layer. Feeding them simultaneously in different corners of the tank is highly recommended to distribute food and prevent any resource competition in their shared vertical zone.

📏 Size Difference & Predation Threat

There is a moderate size difference. The Angelfish (6.0 inches) is noticeably larger than the Black Skirt Tetra (2.5 inches). While not an immediate predation threat under normal circumstances, ensure the smaller specimens are not small enough to be eaten and have plenty of shelter.

Angelfishmid Layer
Scientific NamePterophyllum scalare
Min Tank Capacity30G
Aggressionsemi-aggressive
Temp Envelope75°F - 82°F
pH Chemistry6.0 - 7.5
Scientific NameGymnocorymbus ternetzi
Min Tank Capacity15G
Aggressionpeaceful
Temp Envelope70°F - 85°F
pH Chemistry6.0 - 7.5

Chemistry & Habitat Analysis

Temp Envelope
75°F - 82°F
Shared temperature bounds.
pH Chemistry
6.0 - 7.5
Shared safe pH bounds.
Combined Min Tank
30 Gallons
Lowest acceptable volume.

Frequently Asked Questions: Angelfish & Black Skirt Tetra Compatibility

Are Angelfish and Black Skirt Tetra good tank mates?

Behavioral caution. Angelfish is semi-aggressive and may bully, chase, or nip the fins of the peaceful Black Skirt Tetra. Ensure the tank is large and heavily decorated.

Can you put Angelfish and Black Skirt Tetra in the same tank together?

Caution is required due to semi-aggressive behavior. The Angelfish displays minor territorial behaviors and may chase or stress the Black Skirt Tetra, especially in smaller tanks. Cohabitation is only possible if you provide ample hiding spaces, breaks in line-of-sight, and separate feeding zones.

What water temperature and pH parameters do Angelfish and Black Skirt Tetra need?

Both species require compatible parameters. Angelfish needs a temperature of 75°F to 82°F and a pH of 6.0 to 7.5. Meanwhile, Black Skirt Tetra needs a temperature of 70°F to 85°F and a pH of 6.0 to 7.5. Shared overlap range: 75°F–82°F temperature and 6.0–7.5 pH overlap.

What is the minimum combined tank volume required to house Angelfish and Black Skirt Tetra?

To successfully house both species together, a baseline of 30 gallons is required. However, because the setup includes territorial behavior from Angelfish (semi-aggressive), we recommend an adjusted minimum tank volume of at least 40 gallons (adding a 10-gallon safety buffer) to establish separate visual boundaries and minimize stress.