HomeCompare fishFlag acara vs Redbreast acara Flag acara vs Redbreast acara: can they live together? Verdict: Not recommendedThe Redbreast acara is aggressive towards other fish.Both are comfortable at 25–26°C (77–79°F).A pH of 6.0–7.5 suits both.Side by sideFlag acaraRedbreast acaraAdult size8 cm (3.1 in)7.5 cm (3 in)Minimum tank75 L (20 US gal)115 L (30 US gal)Temperature22–26°C (72–79°F)25–29°C (77–84°F)pH5.2–7.56.0–7.5Hardness5–12 dGH (89–214 ppm)1–20 dGH (18–357 ppm)TemperamentPeacefulAggressiveCare levelModerateEasyDietOmnivoreOmnivoreSpecies profilesFlag acaraLaetacara curvicepsRedbreast acaraLaetacara dorsigera