Gulf gambusia vs Molly: can they live together?

Verdict: With caution

The Molly grows about twice as long as the Gulf gambusia; watch for bullying or predation.
Both are comfortable at 22–25°C (72–77°F).
A pH of 7.5–7.8 suits both.
Minimum tank for the pair: 20 L (5 US gal)

Side by side

	Gulf gambusia	Molly
Adult size	5 cm (2 in)	10 cm (3.9 in)
Minimum tank	20 L (5 US gal)	–
Temperature	22–25°C (72–77°F)	21–26°C (70–79°F)
pH	6.5–7.8	7.5–8.2
Hardness	–	11–30 dGH (196–535 ppm)
Temperament	–	Peaceful
Community tank	Good	–
Care level	–	Easy
Diet	Omnivore	Omnivore