Guppy

The fish that starts a thousand hobbies. Endless tail shapes and colour strains, constant activity, and famously easy breeding.

Min tank size

40 L

Temperature

22–28 °C

pH

6.8–8

Hardness

8–20 dGH

Group size

3+ (ideally 6)

Diet

Omnivore — flakes, micro pellets, vegetable matter

Lifespan

2–3 years

Adult size

5 cm

Happy in moderately hard water; keep two or three females per male so females aren't harassed. Expect fry — decide early whether you want the population to grow.