Species Profile
Congo Tetra
Phenacogrammus interruptus
Tetraspeaceful
Adult size
3.5″
Minimum tank
30 gal
Temperature
73–82°F
pH
6–7.5
Schooling
Group of 6+
Water level
mid
Grows from juvenile
Typically sold at ~1.5″ and reaches 3.5″ over ~9 months. Plan tank size for the adult, not the fish at purchase.Diet
Flake, pellets, frozen
Notes
Iridescent rainbow scales and flowing fringed fins on males, larger than most tetras at over three inches. Native to the Congo Basin. Wants 30gal of horizontal swimming room and a school of 6+; lone individuals stay drab and hide.
Photo: Radomil / Wikimedia Commons · Source · CC-BY-SA-3.0