HomeCompare fishDwarf rainbowfish vs Mosquitofish Dwarf rainbowfish vs Mosquitofish: can they live together? Verdict: With cautionThe Mosquitofish can be semi-aggressive or nip fins.Both 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 rainbowfishMosquitofishAdult size5 cm (2 in)4 cm (1.6 in)Minimum tank150 L (40 US gal)40 L (11 US gal)Temperature22–28°C (72–82°F)12–29°C (54–84°F)pH6.5–7.56.0–8.0Hardness8–18 dGH (143–321 ppm)5–19 dGH (89–339 ppm)TemperamentPeacefulSemi-aggressiveCommunity tankGoodGoodCare levelEasyEasyDietOmnivoreOmnivoreSpecies profilesDwarf rainbowfishMelanotaenia praecoxMosquitofishGambusia affinis