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Freshwater fish care guide

Red Phantom Tetra

Hyphessobrycon sweglesi

A lively schooling tetra that does best with plant cover, stable water, and room to swim.

Starter tank20+ gal
Temperature70–82°F
pH6–7.5
Group guide8+

Planning your aquarium

The library starting point is 20+ US gallons. Plan for the approximate 1.8-inch adult size and the species' normal activity, not just its current shop size.

The library suggests a group of at least 8. Count every individual when estimating stocking and swimming room.

Mixed-species aquariums may need substantially more space. Tank length, adult behavior, filtration, and hiding spaces all matter.

Tank setup and behavior

  • Include planting or cover without removing all open swimming space.

A lively schooling tetra that does best with plant cover, stable water, and room to swim.

Food and feeding

Food options: Fine tropical flakes, Micro pellets, Frozen brine shrimp.

Use appropriately sized, complete staple foods and rotate suitable foods for variety. Feed modest portions and remove uneaten food.

Compatibility

The current rule-based checker does not list a dedicated pairing warning for this species. That does not mean every pairing is safe; review temperament, adult size, diet, habitat and water requirements.