Rainbow Shark

Epalzeorhynchos frenatum

Minimum Tank Size

55+ gal

Temperature

72–80°F

PH

6.5–7.5

Adult Size

5–6 in

Temperament 

Territorial bottom-oriented fish

Care Difficulty

Intermediate

Diet & Feeding

Feed a varied species-appropriate diet based on a quality prepared staple, supplemented with foods suited to the species. Avoid chronic overfeeding.

Care Instructions

Maintain stable 72–80°F water and suitable chemistry. Plan the aquarium around adult size, behavior, waste production, and swimming space.

Flow & Filtration

Use mature biological filtration, good oxygenation, and flow appropriate to the species. Keep ammonia and nitrite at zero and maintain nitrate with regular water changes.

Planted Tank Suitability

Plant suitability depends on digging, grazing, adult size, and water chemistry. Use hardy or protected plants where necessary.

Tank Mate Compatibility

Good Tank Mates
  • Barbs
  • Rainbowfish
  • Danios

Use Caution 
  • Plecos
  • Loaches

Avoid
  • Other Rainbow Sharks
  • Timid Bottom Fish

Compatibility Notes

Territorial behavior increases with maturity; structure the tank to break lines of sight.

Breeding Notes

Breeding requirements vary by species; use appropriate caves, spawning sites, or a dedicated breeding setup when attempting to raise fry.