HomeCompare fishBloodfin tetra vs Gulf gambusia Bloodfin tetra vs Gulf gambusia: can they live together? Verdict: CompatibleBoth are comfortable at 22–25°C (72–77°F).A pH of 6.5–7.8 suits both.Minimum tank for the pair: 75 L (20 US gal)Side by sideBloodfin tetraGulf gambusiaAdult size5.5 cm (2.2 in)5 cm (2 in)Minimum tank75 L (20 US gal)20 L (5 US gal)Temperature18–28°C (64–82°F)22–25°C (72–77°F)pH6.0–8.06.5–7.8Hardness10–30 dGH (178–535 ppm)–TemperamentPeaceful–Community tankExcellentGoodCare levelEasy–DietOmnivoreOmnivoreSpecies profilesBloodfin tetraAphyocharax anisitsiGulf gambusiaGambusia vittata