Least Killifish

Heterandria formosa

Difficulty (1-5): 2/5

Description

A livebearer despite the name, and among the smallest fish in the hobby at under three centimetres. Drops one or two fry at a time rather than a brood.

Water test requirements

  • pH: 7 – 8.2
  • Temperature: 18 – 26 °C
  • General Hardness (GH): 6 – 25 °dGH
  • Carbonate Hardness (KH): 3 – 20 °dKH
  • Nitrate (NO3): ≤ 30 mg/L