Blackline Tetras

A rarely seen and highly sought-after species of schooling tetra, the Costae or Blackline Tetra is an extremely active species, they form large schools or shoals in the wild as a defense from predation. In the aquarium, their fast-moving nature and unique tail stripe pattern adds flash and movement to the middle and upper levels of the aquarium which has made them extremely popular

Water Parameters 

• Temperature: 70–81°F
  
• Chlorine/chloramines: 0 ppm (very toxic)
  
• Ammonia/Nitrite: 0 ppm
  
• Max Nitrate: 30 ppm
  
• pH: 6–8
• dGH 2-15
• Minimum Tank Size: 30 gallons
  
• Best in groups of 6 or more