HomeCompare fishDwarf rainbowfish vs Bloodfin tetra Dwarf rainbowfish vs Bloodfin tetra: can they live together? Verdict: CompatibleBoth are comfortable at 22–28°C (72–82°F).A pH of 6.5–7.5 suits both.Minimum tank for the pair: 150 L (40 US gal)Side by sideDwarf rainbowfishBloodfin tetraAdult size5 cm (2 in)5.5 cm (2.2 in)Minimum tank150 L (40 US gal)75 L (20 US gal)Temperature22–28°C (72–82°F)18–28°C (64–82°F)pH6.5–7.56.0–8.0Hardness8–18 dGH (143–321 ppm)10–30 dGH (178–535 ppm)TemperamentPeacefulPeacefulCommunity tankGoodExcellentCare levelEasyEasyDietOmnivoreOmnivoreSpecies profilesDwarf rainbowfishMelanotaenia praecoxBloodfin tetraAphyocharax anisitsi