HomeCompare fishClown rasbora vs Harlequin rasbora Clown rasbora vs Harlequin rasbora: can they live together? Verdict: With cautionThe Clown rasbora grows about twice as long as the Harlequin rasbora; watch for bullying or predation.Both are comfortable at 24–25°C (75–77°F).A pH of 5.5–7.0 suits both.Minimum tank for the pair: 110 L (29 US gal)Side by sideClown rasboraHarlequin rasboraAdult size9 cm (3.5 in)4 cm (1.6 in)Minimum tank110 L (29 US gal)55 L (15 US gal)Temperature24–29°C (75–84°F)22–25°C (72–77°F)pH5.5–7.05.0–7.0Hardness2–10 dGH (36–178 ppm)5–12 dGH (89–214 ppm)TemperamentPeacefulPeacefulCommunity tankGoodExcellentCare levelEasyEasyDietOmnivoreOmnivoreSpecies profilesClown rasboraRasbora kalochromaHarlequin rasboraTrigonostigma heteromorpha