HomeCompare fishHead-and-taillight tetra vs Pearl danio Head-and-taillight tetra vs Pearl danio: can they live together? Verdict: CompatibleBoth are comfortable at 22–25°C (72–77°F).A pH of 6.0–8.0 suits both.Minimum tank for the pair: 75 L (20 US gal)Side by sideHead-and-taillight tetraPearl danioAdult size5 cm (2 in)5 cm (2 in)Minimum tank75 L (20 US gal)75 L (20 US gal)Temperature22–26°C (72–79°F)20–25°C (68–77°F)pH6.0–8.06.0–8.0Hardness5–19 dGH (89–339 ppm)5–19 dGH (89–339 ppm)TemperamentPeacefulPeacefulCommunity tankExcellentExcellentCare levelEasyEasyDietOmnivoreOmnivoreSpecies profilesHead-and-taillight tetraHemigrammus ocelliferPearl danioDanio albolineatus