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Rarely available, Rainbow Emperor Tetra aquarium stock is all imported from South America as this fish is difficult to breed. Males have a mosaic of colour on their flanks and a red eye. Revered for their peaceful attitudes and relatively easy care requirements, these fish are great for beginners and novice fish keepers alike. 

The Rainbow Emperor Tetra is native to Colombia’s isolated Rio San Juan River system.

Features of Rainbow Emperor Tetra's:

  • The shape of the fish is long and slender.
  • Males have a rainbow mosaic colour on their flanks and red eye
  • Males tend to be slightly longer and take on a more pointed shape. Meanwhile, the females have a plumper body.
  • Mid dweller fish in the fish tank
  • Life Span : 6 yrs

Rainbow Emperor Tetra : Care, Diet and Tank Mates

Best Aquarium Size for Rainbow Emperor Tetra's:

A minimum capacity of 50 liters to accommodate a small school of Rainbow Emperor Tetras. A larger tank will allow for a more natural swimming space and better water quality.

Rainbow Emperor Tetra Tank Mate Compatibility:

Rainbow Emperor Tetras are social fish and thrive when kept in a school of at least six individuals. Rainbow Emperor Tetras are generally peaceful and can be kept with other peaceful community fish. Avoid keeping them with aggressive or fin-nipping species.


Rainbow Emperor Tetra Diet & Feeding:

Rainbow Emperor Tetras are omnivorous and readily accept a variety of foods. Provide a balanced diet consisting of high-quality flake or pellet food. Supplement their diet with live or frozen foods like bloodworms, brine shrimp, and daphnia to enhance their coloration and provide enrichment.

Rainbow Emperor Tetra Tank Setup

  • Substrate: Choose a fine gravel or sand substrate to mimic their natural habitat.
  • Plants: Include live or artificial plants to provide cover and create a natural environment. Black Emperor Tetras appreciate dense vegetation, so consider adding floating plants as well.
  • Lighting: Provide moderate lighting to support plant growth while allowing for shaded areas in the aquarium.
  • Filtration and Water Quality: Use a quality filtration system to maintain water cleanliness and remove waste. A combination of mechanical, chemical, and biological filtration is recommended.
  • Heater : A heater would be necessary if the winter temperature is too low in your state of Australia.

Additional Information

Fish Keeping Snapshot :

Preferred Water Parameters :